"Symmetry in Mechanics: A Gentle, Modern Introduction" by Stephanie Frank Singer is a textbook that delves into the subject areas of science and mathematics, specifically focusing on symmetry in mechanics. Published by Birkhäuser Boston in 2001, this trade paperback book is 193 pages long and includes illustrations to assist in understanding the concepts presented. The book is aimed at a scholarly and professional audience, and it covers topics in geometry and differential mechanics. With a gentle approach to the subject matter, this book offers a comprehensive introduction to symmetry in mechanics for those interested in the field.