New York Post Fiendish Sudoku: The Official Utterly Addictive Number-Placing Puzzle
by Wayne Gould
ISBN 13: 9780061173363
Format: Illustrated (320 pages) Publisher: William Morrow & Company Published: 30 Jul 2006
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Mathematical Quickies: 270 Stimulating Problems with Solutions (Dover Recreational Math)
by C.W. Trigg
ISBN 13: 9780486249490
Format: Illustrated (210 pages) Publisher: Dover Publications Inc. Published: 28 Mar 2003
The Daily Telegraph Cryptic Crosswords 60
by Telegraph Group Limited
ISBN 13: 9780330451864
Format: Paperback (193 pages) Publisher: Pan Books (UK) Published: 07 Sep 2007
International Mathematical Olympiad Volume 3: 1991-2004 (Anthem Learning)
by István Reiman
ISBN 13: 9781843312048
Format: Illustrated (188 pages) Publisher: Anthem Press Published: 05 Sep 2005