A Smoother Pebble: Mathematical Explorations by Donald C. Benson (Professor of Mathematics, Professor of Mathematics, University of California, Davis (Emeritus))
This book takes a novel look at the topics of school mathematics-arithmetic, geometry, algebra, and calculus. In this stroll on the mathematical seashore we hope to find, quoting Newton, ...a smoother pebble or a prettier shell than ordinary... This book assembles a collection of mathematical pebbles that are important as well as beautiful.