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Figures for Fun: Stories, Puzzles and Conundrums (Dover Brain Games: Math Puzzles): Perelman, Yakov: 9780486795683: Amazon.com: Books
Mindbending Puzzles & Conundrums Book – The Lagoon Group
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Conundrums, Riddles and Puzzles by Dean Rivers - Ebook | Scribd
Conundrums Riddles and Puzzles, by Dean Rivers: A Project Gutenberg E-book
QUANTUM PUZZLES: Quirky Conundrums to Challenge Your Inner Einstein - HamiltonBook.com
The Times MindGames Word Puzzles and Conundrums Book 4 by The Times Mind Games 9780008343781 | eBay
Conundrums, Riddles and Puzzles: Containing One Thousand of the Latest and Best Conundrums, Gathered From Every Conceivable Source, and Comprising Many That Are Entirely New and Original (Classic R...: Rivers, Dean: 9781333644222:
The Times Mindgames Word Puzzles & Conundrums: Book 3 - By Times Uk (paperback) : Target