In this engaging and readable book, Dr. Körner describes various lively topics that continue to intrigue professional mathematicians. The topics range from anchors’ design and the Battle of the Atlantic to the outbreak of cholera in Victorian Soho. The author uses relatively simple terms and ideas yet explains difficulties and avoids condescension. If you are a mathematician who wants to explain to others how you spend your working days, seek inspiration. This book will appeal to everyone interested in the use of mathematics.