My guest this week is Irvine Welsh – who, three decades after his era-defining hit Trainspotting, returns with a direct sequel, Men In Love. Irvine tells me what Sick Boy, Renton, Spud and Begbie mean to him, why his new book hopes to encourage a new generation to discover Romantic verse and shagging, and why MDMA deserves more credit for the Good Friday Agreement than Tony Blair.

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My guest this week is the writer M. John Harrison, who joins me to talk about the rerelease of his 1992 novel The Course of the Heart – a deeply strange and riddling story of grief, friendship, memory and occult magic. We talk about why this book is so personal to him, what he learned from Charles Williams and Arthur Machen, turning his back on science fiction/fantasy and returning to it – as well as how probably the most acclaimed of all his novels, Light, came about after Iain Banks told him he wasn't having enough fun.

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Sam Leith's guest in this week’s Book Club podcast is one of the most popular living thriller writers. Karin Slaughter has made her native Georgia her fictional territory, and she joins Sam as she launches a new series set in a whole new county, with the book We Are All Guilty Here. They talk 'planning versus pantsing', what it means to write violence against women as a woman and how becoming the showrunner for television compares to the sovereignty of the novelist.

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