Alien Christmas

From Author Wars - https://authorwars.com/books/alien-christmas-901968.html

Overview:

Unknown. Matrix, #70 (Unknown, Terry Pratchett, BSFA, £0.75, 24 pages, A4, MAGAZINE)
Unknown. Wrath of the Fanglord (Unknown, Terry Pratchett, Rune Press, ebook, Non-fiction)
Unknown. Wrath of the Fanglord (Unknown, Terry Pratchett, Rune Press, quarto, Non-fiction)
2004 . Once More with Footnotes (2004, Terry Pratchett, NESFA Press, ISBN-10: 1886778574, $25.00, 282 pages, Hardcover, Collection)
2014 . A Slip of the Keyboard: Collected Nonfiction (2014, Terry Pratchett, Doubleday, ISBN-10: 9780385538305, $29.95, 307 pages, Hardcover, Non-fiction)
2014 . A Slip of the Keyboard: Collected Nonfiction (2014, Terry Pratchett, Random House Audio, ISBN-10: 9780804193641, digital audio download, Non-fiction)
2014 . A Slip of the Keyboard: Collected Non-Fiction (2014, Terry Pratchett, Doubleday (UK), ISBN-10: 9780857521224, £20.00, [xvii]+336 pages, Hardcover, Non-fiction)