It’s the final leg of the Long Journey as Joel Martin and Deanne Sheldon-Collins answer our Invitation! Both previous Long Earth guests return to discuss the fifth and final of Terry Pratchett and Stephen Baxter’s collaborations, the 2016 novel The Long Cosmos.

It’s 2070, and a message has been received across the Long Earth: “JOIN US.” Joshua Valienté hears it and gets one of his headaches, but he’s still mourning the death of his ex-wife Helen, so he rejects the call to adventure. He goes off alone into the High Meggers, despite multiple warnings that he’s too old for this shit. Meanwhile Nelson Azikiwe finds and loses a new family, and goes in search of Lobsang for help. And the Next find that the Invitation is more than two words long, and put into action far-reaching plans to bring everyone together to follow its instructions…

The last of Pratchett’s novels to be published, The Long Cosmos brings the series to a close. (If you need a recap, see our “The Longer Footnote” bonus episode.) Like the previous book, The Long Utopia, this one also takes place on a relatively small number of Earths – but it has its gaze fairly firmly fixed on the stars above, and wears its influences (especially Carl Sagan’s Contact) on its sleeve.

Who got their epic first contact novel in our weird parallel worlds travelogue? Is this where you thought the story would go? What would your friends be able to predict about you if they kept a detailed spreadsheet? After five books, is this a satisfying conclusion? Join the conversation by using the hashtag #Pratchat78 on social media.

Guest Joel Martin (he/him) is a writer, editor and podcaster now based in the UK. He previously hosted the writing podcast The Morning Bell, and produced The Dementia Podcast for Hammond Care. Joel’s previously been on the show to discuss The Long Earth, The Long Mars, The Colour of Magic and The Light Fantastic, making him our most frequent guest. He recommended the 1989 novel Hyperion by Dan Simmons, along with its sequel The Fall of Hyperion. (There are also two more novels in the Hyperion Cantos series.)

Guest Deanne Sheldon-Collins (she/her) is an editor and writer in Australia’s speculative fiction scene, working for Aurealis magazine, Writer’s Victoria, the National Young Writer’s Festival, and as co-director of the Speculate festival. Deanne previously joined us for The Long War and The Long Utopia. She once again recommended Pratchat listener favourite, Martha Wells’ series The Murderbot Diaries, which consists of seven novels and novellas. The first is 2017’s All Systems Red.

As usual, you can find notes and errata for this episode on our website.

We’re off to Adelaide to be guests at the Australian Discworld Convention, where on Friday 12 July we’ll be recording a live episode with authors Tansy Rayner Roberts and Karen J Carlisle! We’ll be discussing Pratchett’s Discworld short fiction “Death and What Comes Next”, and probably more broadly how Pratchett writes about Death (and death). The story is available online at the L-Space Web. We’ll mostly be taking questions from the live audience, but you can also share yours via social media (if you’re quick!) using the hashtag #Pratchat79.

Want to help us get to the end of our six(ish) year mission and read every Pratchett book – and more? You can support us with a tip, or a subscription for as little as $2 a month, and that’s cuttin’ our own throats! See our Support Us page for details.