by Graham Round (Author), Graham Round (Author), Jenny Tyler (Author)
-- Puzzle books full of thought provoking problems and brain teasers-- Clues at the end of each book help with the more difficult problems
Format: Paperback
Pages: 32
Publisher: Usborne Publishing Ltd
Published: 01 Aug 1980
ISBN 10: 0860204332
ISBN 13: 9780860204336