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OCTO Spectrum

OCTO Spectrum

by Gardner, Doug
No customer reviews yet ISBN 9781449995706

The OCTO puzzle is a patented math and logic challenge that is part Sudoku, part Kakuro, and part something else entirely! OCTO Spectrum is a collection of 60 OCTO puzzles that range from Easy to Very Hard--the perfect book for puzzle fans who want to experience the full spectrum of challenge available from the OCTO puzzle.

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Pub dateMar 4, 2010
ISBN-101449995705
ISBN-139781449995706
LanguageEnglish
Last updated 2025-07-17 06:08
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