Unread. Instant purchase, late-night purchase, and silent transactions are OK. Please note that there may be some warping due to home storage. We appreciate your understanding. We appreciate your understanding that this item has been stored at home. --- A book that allows you to deeply learn the techniques of problem-solving. - Title: The Art and Craft of Problem Solving - Author: Paul Zeitz - Publisher: O'Reilly Japan - Edition: 2nd Edition - Series: O'Reilly Math Series - Price: 3520 yen (tax included)