by Harshman · tapa blanda · ISBN 9788430587438
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«99 Enigmas para Estimular el Ingenio» is Harshman's puzzle book, published by Tikal Ediciones in paperback (112 pages, in Spanish).
The volume brings together 99 short puzzles and challenges designed to stimulate ingenuity: each one invites readers to exercise reasoning and creativity, with problems that are solved in an entertaining way.
The Spanish translation is by Josep Pelfort Gregori; the edition appeared in January 2010.
For fans of pastimes and brain teasers looking for short challenges to exercise the mind.
