Sheila M. Perry (2004), is "an assortment of short stories, articles, introductions, and ephemera" by Pratchett which "have appeared in books, magazines, newspapers, anthologies, and program books, many of which are now hard to find". These include the short stories "The Sea and Little Fishies", "Troll Bridge", "The Hades Business", "Final Reward", "Hollywood Chickens", "Turntables of the Night", "Once and Future", and "#ifdef DEBUG + 'world/enough' + 'time'", as well as nonfiction articles. The Writers' and Artists' Yearbook 2007 includes an article by Pratchett about the process of writing fantasy. The five-book "Long Earth" series written with Stephen Baxter, published between 2012 and 2016 beginning with The Long Earth. Unfinished texts According to Pratchett's assistant Rob Wilkins, Pratchett left "an awful lot" of unfinished writing, "10 titles I know of and fragments from many other bits and pieces." Pratchett had mentioned two new texts, Scouting for Trolls and a Discworld novel following a new character. The notes left behind outline ideas about "how the old folk of the Twilight Canyons solve the mystery of a missing treasure and defeat the rise of a Dark Lord despite their failing memories"; "the secret of the crystal cave and the carnivorous plants in the Dark Incontinent", about Constable Feeney of the Watch, first introduced in Snuff, involving how he "solves a whodunnit among the congenitally decent and honest goblins"; and a second book about Amazing Maurice from The Amazing Maurice and His Educated Rodents. Pratchett's daughter, the writer Rhianna Pratchett, is the custodian of the Discworld franchise. She said she had no plans to publish her father's unfinished work or continue the Discworld series. Pratchett told Neil Gaiman that anything that he had been working on at the time of his death should be destroyed by a steamroller. On 25 August 2017, Wilkins fulfilled this wish by crushing Pratchett's hard drive under a steamroller at the Great Dorset Steam Fair. Television Terry Pratchett: Living With Alzheimer's (2009) Terry Pratchett: Choosing to Die (2011) Terry Pratchett: Facing Extinction (2013) Terry Pratchett: Back In Black (2017) Works about Pratchett A collection of essays about his writings is compiled in the book Terry Pratchett: Guilty of Literature, edited by Andrew M. Butler, Edward James and Farah Mendlesohn, published by Science Fiction Foundation in 2000 (). A second, expanded edition was published by Old Earth Books in 2004 (). Andrew M. Butler wrote the Pocket Essentials Guide