The PuzzleQuest Book range were first advertised in issue 3 and later in issue 5 of Warlock. These named the books as The Tasks of Tantalon and Casket of Souls. Both were published in hardback by Oxford University Press. The Tasks of Tantalon was later published in paperback by Puffin Books as part of the Fantasy Questbook series, which included other books unrelated to Fighting Fantasy. Casket of Souls was published in hardback by Oxford University Press whilst simultaneously being published as paperback by Penguin Books and thus did not form part of the Fantasy Questbook series. The Tasks of Tantalon stated explicitly on the title page of the Oxford University Press version of the book that it was a PuzzleQuest Book and also on the back cover. In the Puffin Books references to PuzzleQues