Linda Kinstler’s Latvian grandfather disappeared after WWII and the family never spoke about him. But as she delved into Boris Kinstler’s life she found he had been a member of a killing brigade in the SS linked to the ‘Butcher of Riga’ Herbert Cukurs, before becoming a KGB agent and then vanishing. She attempts to uncover the truth in Come To This Court and Cry: How The Holocaust Ends, but also interrogates the uncertainties of memory, family, nation and justice.

Although Herbert Cukur’s name came up frequently at the Nuremberg war crime trials for the killing of tens of thousands of Jews, he managed to escape and find refuge in South America. It was there he was murdered by Mossad agents who left a note from Those Who Will Never Forget saying ‘the condemned man has been executed’. The Israeli investigative journalist Ronen Bergman has uncovered his country’s most secret activities in Rise and Kill First: The Secret History Of Israel's Targeted Assassinations (translated by Ronnie Hope).

The Nuremberg trials in the aftermath of WWII mark the birth of international law and set the framework of modern human rights law. The barrister and writer Philippe Sands has appeared frequently before international courts, and has been involved in many of the most important cases of recent years from Yugoslavia to Rwanda to Guantanamo. He explains what can be done when countries – like Russia – refuse to recognise the jurisdiction of international law.

Producer: Katy Hickman

The failure of British politics and public institutions to tackle social inequality is down to proximity, so says the writer, performer and activist Darren McGarvey. In The Social Distance Between Us: How Remote Politics Wrecked Britain he looks at the huge gulf – geographic, economic and cultural – between those who make decisions and the people on the receiving end of them. He tells Adam Rutherford it’s time for a meaningful discussion in which the voiceless and powerless get heard. The Social Distance Between Us is BBC Radio 4's Book of the Week.

The poet Jo Clement gives voice to the stories and people of her family’s Romany past. In her collection Outlandish she has no time for Romantic impressions of British Gypsy ethnicity as she moves from ancient stopping-places to decaying council estates. Her poems are imaginative protests that cast light on a hidden and threatened culture.

It’s a far cry from the world of former broker Brett Scott. But in his latest book, Cloudmoney: Cash Cards, Crypto and the War for our Wallets he argues that social inequality will only increase if cash is allowed to disappear. A cashless society is the vision of big finance and tech, and he warns that it will end up only benefitting the few, while infringing the privacy of the many.

Producer: Katy Hickman

The environmentalist George Monbiot argues that farming is the world’s greatest cause of environmental destruction, but few people want to talk about it. In Regenesis: Feeding the World Without Devouring the Planet he presents a vision for the future of food production. He tells Tom Sutcliffe that new ideas and technologies from soil ecology to laboratory-grown food could change the way people eat while regenerating the landscape.

But many farmers believe that they have been unfairly accused of ecological mismanagement, and that they are uniquely placed to restore the earth and provide a sustainable future. Sarah Langford has returned to her country roots after working for many years as a criminal barrister in the city. In her book, Rooted: Stories of Life, Land and a Farming Revolution she shows how a new generation of farmers are set on a path of regenerative change.

While Sarah Langford comes from a family of farmers, for many city dwellers it can be difficult to cultivate a connection with the earth. In her memoir, Unearthed: On Race and Roots and How the Soil Taught Me I Belong, Claire Ratinon, explores how she grew up feeling disconnected with the natural world and with family stories of slave ancestors forced to work the land. Through learning to grow her own vegetables and especially the food of Mauritius, she has finally felt able to put down roots.

Producer: Katy Hickman

In front of an audience at this year’s Hay Festival Helen Lewis talks to three prize winning authors about their work.

Damon Galgut’s Booker-winning The Promise tells the story of a family and a country – South Africa – and the failed promises that destroy them both. The exciting promise of a super-connected world where memories are currency is set against the quest for privacy in Jennifer Egan’s new novel The Candy House. And Margo Jefferson examines every passion, memory and influence – from family to jazz to art – in her new memoir, Constructing a Nervous System.

Producer: Katy Hickman

Adam Rutherford explores how other species can help us understand our own. The world-renowned primatologist Frans de Waal has spent decades observing the behaviours of chimps and bonobos. In Different: What Apes Can Teach Us About Gender he looks at, and questions, the interplay of biology and culture. Using his knowledge of apes he challenges widely held beliefs about masculinity and femininity and assumptions about authority, power, cooperation and sexual behaviour.

Nichola Raihani’s research focuses on the evolution of social behaviour in humans and non-human species. In her book, The Social Instinct, she looks at the science of cooperation and how humans have evolved socially and built, and fought over, hugely complex communities. But she also suggests we might have something to learn from the pied babblers of the Kalahari, and the cleaner fish of the Great Barrier Reef – two of the most fascinating and extraordinarily successful species on the planet.

While ants and honey bees are often held up as exemplars of social cohesion, the entomologist Seirian Sumner wants to rehabilitate the much-maligned thug of the insect world, the wasp. In Endless Forms: The Secret World of Wasps she shows how wasps are older, cleverer and more diverse than their evolutionary new-comer the bee. And she makes the case that they hold hidden treasures of relevance to human culture, survival and health, and one species even taught us how to make paper.

Producer: Katy Hickman

Every moment of the day tiny biological clocks are ticking throughout the body, but Russell Foster, world-renowned expert in circadian neuroscience, warns that modern life is playing havoc with these ancient and delicate mechanisms. In his latest book, Life Time: The New Science Of The Body Clock And How It Can Revolutionise Your Sleep and Health, Professor Foster reveals how this essential part of our biology works. He tells Tom Sutcliffe how new understandings about our daily routines could help reset how we live and sleep.

ViSiBLE is a professional theatre company dedicated to creating new and provocative works, with and about older people. Its latest performance, Five Characters in Search of a Good Night's Sleep, is at the Southwark Playhouse until 21st May. ViSiBLE’s founder, the playwright Sonja Linden, says the new piece was inspired by the experiences of the actors who as they’ve aged have found sleep more elusive and sleep-inducing techniques more desperate.

Ros Holmes is a lecturer in Chinese Studies at the University of St Andrews. Her research focuses on ideas about sleep and insomnia, and how they’ve been represented in the visual culture of twentieth century and contemporary China. From the images of ‘national awakening’ in the early years of the Republic and the always-alert workers of the Cultural Revolution to the cities that never sleep today – sleep deprivation has become part of life in China.

Producer: Katy Hickman

Photo Image: 'Five Characters in Search of a Good Night's Sleep' (credit: Bessell Photography)

The Syrian architect Marwa al-Sabouni is the Guest Co-Director of this year’s Brighton Festival and her flagship project The Riwaq on Hove seafront provides a space for social and artistic exchange. Rebuilding is the festival’s theme and the subject of her latest book, Building for Hope – Towards an Architecture of Belonging which explores how cities can be rebuilt after crisis and war. She tells Helen Lewis that architecture has a pivotal role in generating community, not just in devastated cities, but all around the world.

Dame Jo da Silva is an engineer at the building firm Arup who specialises in disaster relief. After years spent realising the high designs of architects for everything from airports to bus shelters, she became involved in projects to rebuild communities hit by catastrophes. As urbanisation reaches record levels globally she argues that it’s more important than ever to build in sustainability and resilience.

The historian Jessie Childs focuses her story of the violence and disaster of the English civil war on The Siege of Loyalty House in the 1640s. To the parliamentarians Basing House, the royalist stronghold, was the devil’s seat. Over two years, the inhabitants were bombarded, starved and gassed from the outside, and faced smallpox, spies and mutiny from within.

Producer: Katy Hickman

Wonder at the natural world has inspired people and fuelled curiosity for millennia. The ancient Greek Theophrastus had interests that spread far and wide, from biology and physics to ethics and metaphysics. But although he was Aristotle’s friend and collaborator, and his notes on botany inspired Linnaeus, his name has mostly been forgotten. The writer Laura Beatty’s new book, Looking for Theophrastus, aims to rescue him from obscurity.

The scientist, Suzie Sheehy, still feels a childlike wonder at the way physics seems to be able to describe everything – from the smallest subatomic particle to the scale of the Universe. In The Matter of Everything: Twelve Experiments That Changed Our World, she looks back at the people who engineered ground-breaking experiments, and the human ingenuity, creativity and curiosity, as well as luck and serendipity that propelled them forward.

While physicists attempt to describe and define the universe, the workings of the human mind still remain a challenge to scientists and philosophers. In The Book of Minds, the science writer Philip Ball looks at what we know about the minds of other creatures, from octopuses to chimpanzees, and of the workings of computers and alien intelligences. By understanding how minds differ, he argues, the better we can understand our own.

Producer: Katy Hickman

In The Age of the Strongman, the journalist Gideon Rachman explores how populist and authoritarian leaders have become a central feature of global politics. Since Vladimir Putin took power in Russia at the beginning of the new millennium, self-styled strongmen have emerged across the globe, from Trump and Bolsonaro to Orbán, Xi and Modi. Rachman tells Tom Sutcliffe how these leaders have taken power and the challenge they pose to liberal democracy.

Judy Dempsey is a senior fellow at Carnegie Europe and editor in chief of the Strategic Europe blog. She explains how Viktor Orbán has tightened his grip on power in Hungary, while the EU has dragged its heels. And how Putin’s war in Ukraine has not only exacerbated pre-existing global divisions but divided Europe as well.

History is littered with powerful leaders, and Christopher de Bellaigue, tells of the rise of one of the most feared – Suleyman the Magnificent. In The Lion House: The Coming of a King the 16th century Ottoman Sultan dominates the lives of those from Baghdad to the walls of Vienna.

Producer: Katy Hickman

The new novel, Glory, by prize winning writing NoViolet Bulawayo is a postcolonial tale of power and tyranny – an African Animal Farm. It’s set in the fictional Jidada, that resembles Zimbabwe during the overthrow of Robert Mugabe, and is populated by a vivid cast of animals – from the vicious dog-soldiers to the powerful Old Horse leader himself. She tells Adam Rutherford how her chorus of animal voices help reveal the human world more clearly.

The journalist Dipo Faloyin wants to push against harmful stereotypes of modern Africa. In his latest book, Africa Is Not A Country, he argues that a continent of over 1.4 billion people, 54 countries and more than 2,000 languages has been reduced to a simplistic story. He looks at how politics, culture and community have emerged in different ways across Africa.

Julia Gallagher is Professor of African Politics at SOAS, University of London. Her research explores the architecture of state buildings in different African countries – from the re-purposed colonial structures to the new palatial palaces of post-independence – and how citizens respond to them. Also as the African Union celebrates twenty years since it was founded – housed in a new compound built by the Chinese in Addis Ababa – she looks at the position of the AU in the 21st century.

Producer: Katy Hickman

Image: photograph of NoViolet Bulawayo - copyright Nye' Lyn Tho