Mathematicians and people interested in mathematics, especially teachers, will welcome the appearance of Mathematical Wrinkles by Samuel I. Jones. It contains a large collection of arithmetical, algebraical, geometrical and other problems, exercises and recreations, mostly appropriate for high school pupils, collected from many sources with an admixture of some original ones by the author himself. No one will object to finding among them some old well-known puzzles because there is no harm in finding these repeated in several books of the same nature. The book covers 320 pages, not counting the index