From 2010- Stefan Klein, author of "Leonardo's Legacy: How Da Vinci Reimagined the World."

William Kuhn talks about his first novel, "Mrs Queen Takes the Train," which imagines a remarkable day in which Queen Elizabeth II wanders off of the palace grounds by herself and experiences something of an adventure in the 'outside world.' The novel was published ten years ago, but is still doing well. It recently attracted its 1000th customer review on Amazon.

Best-selling author Tom Clavin discusses his latest book, "Follow me to Hell: McNelly's Texas Rangers and the Rise of Frontier Justice."

Maestro Pasqual Laurino, artistic director of the Racine Symphony, talks about their performance this Friday evening of Haydn's "Seven Last Words of Christ."

From 2019- Adam Waytz, author of "The Power of Human: How our shared humanity can help us create a better world."

I speak with Amanda Pollack, producer and director of the American Experience documentary film "The Sun Queen," which tells the story of Maria Telkes, a visionary in the field of solar energy. She faced many obstacles in her career - including resistance from many men in the field - but pressed on. The film airs Tuesday evening on PBS.

From 2011- Susannah Charleson, author of "Scent of the Missing: Love and Partnership with a Search and Rescue Dog."

(From 2017) - Sylvia Brown, author of "Grappling with Legacy: Rhode Island's Brown Family and the American Philanthropic Impulse." The Brown family was quite prominent and influential in early America - and their most notable ongoing legacy is Brown University. The book explores some of the complexities and controversies that are part of the family's history.

Patti McCracken, author of "The Angel Makers: Arsenic, a Midwife, and Modern History's Most Astonishing Murder Ring." The book tells the true and astounding story of what unfolded in a small village in Hungary in the years following World War One when a midwife came to the aid of abused women in the village by surreptitiously killing their abusive husbands by arsenic poisoning. The practice ultimately widened in scope.

From the archives (2004)- Richard Thieme, a former Episcopal priest turned technology commentator, talks about his book "Islands in the Clickstream," which features 144 essay from his column of the same name. Thieme offers remarkable insights on how technology continues to affect us and how we interact with one another and the world. Part two features an archival conversation about National Geographic's Great Nature Project.