This book, "Förskolebarn i Matematikens värld" by Elisabet Doverborg and Ingrid Pramling Samuelsson, is a comprehensive guide to teaching mathematics to preschool children. The book explores a variety of methods and approaches, focusing on making learning fun and engaging. The authors discuss the importance of play and exploration in developing mathematical understanding, and they provide practical tips for educators working with young children. With its engaging and informative style, "Förskolebarn i Matematikens värld" will be an invaluable resource for any preschool teacher or parent looking to foster a love of mathematics in young learners.