It is long-as many pages as the combinatorics and number theory chapters combined-but it is merely an introduction to the subject. This new edition of The Art and Craft of Problem Solving is an expanded, and, I hope, improved version of the original work. When detectives speak of the moment that a crime becomes theirs to investigate, they speak of 'catching a case,' and once caught, a case is like a cold: it clouds and consumes the catcher's mind until, like a fever, it breaks or, if it remains unsolved, it is passed on like a contagion, from one detective to another, without ever entirely releasing its hold on those who catch it along the way. Printed in the United States of America 10 9 8 7 6 5 4 3 2 I To order books or for customer service please, call 1 -800-CALL WILEY (225-5945). Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., I I I River Street, Hoboken, NJ 07030-5774, (20 1 )748-60 1 1, fax (20 1 )748-6008.

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THE ART AND CRAFT OF PROBLEM SOLVING Second EditionДЄngela Battle Jennifer Battista Daniel Grace Ken Santor Amy Sell Michael St.

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