Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch is a 1990 novel written as a collaboration between the English authors Terry Pratchett and Neil Gaiman, who in turn were dubbed "Double Trouble" by the British press.
First edition cover
Neil Gaiman and Terry Pratchett signing the first American edition of Good Omens at Minneapolis' DreamHaven Books, in Sept 1990.
Sir Terence David John Pratchett was an English author, humorist, and satirist, best known for his 41 comic fantasy novels set on the Discworld, and for the apocalyptic comedy novel Good Omens (1990) which he wrote with Neil Gaiman.
Pratchett at the 2012 New York Comic Con
Pratchett at Worldcon 2005 in Glasgow, August 2005
Pratchett drinking Irish stout shortly after receiving an honorary degree from Trinity College Dublin, in 2008