A New Look at Arithmetic
The New American Library, 1965. Adler, Ruth. 1st printing. Paperback. 12mo. Spine lightly bowed and creased. Binding tight. Wraps marked by patina, light edge wear and blotted out cover price. 309p. White pages unmarked.
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The Impossible in Mathematics: The Trisection of an Angle, The Fifteen Puzzle, and Other Problems
The John Day Company, 1967. 8Vo Softcover. 32pp. Staplebound softcover. Text and illustration is clean on unmarked, uncreased pages. Hinge is secure, textblock is square with pointed corners. Slight overall shelf/timewear, address label on front cover, name stamp on inner covers.
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