Decode the Deadliest Joke in the Universe (Humour)
by Kjartan Poskitt
ISBN 13: 9780590553476
Format: Paperback (96 pages) Publisher: Scholastic Hippo Published: 16 Apr 1993
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Practical Jokes (Brat Packs)
by Kjartan Poskitt, Martin Chatterton
ISBN 13: 9780590197991
Format: Illustrated (64 pages) Publisher: Scholastic Hippo Published: 20 Mar 1998
Easy Questions, Evil Answers (Murderous Maths)
ISBN 13: 9781407114514
Format: Paperback (160 pages) Publisher: Scholastic Published: 02 Aug 2010
Kjartan Poskitt's Warp Maze
by Kjartan Poskitt, Steven Appleby
ISBN 13: 9780439998314
Format: Hardcover (28 pages) Publisher: Scholastic Published: 20 Sep 2002