Willem Westra's 'Het kaatsspel handleiding met historische aanteekeningen en kaatszangen' is a comprehensive guide to the traditional Frisian sport of kaatsspel. Structured as a manual, the book offers detailed instructions on how to play the game, accompanied by historical annotations and traditional kaatszangen (songs) that add a cultural richness to the text. Written in a clear and accessible style, the book serves as both a practical guide for players and a valuable resource for those interested in the history and traditions of kaatsspel. Westra's meticulous research and passion for the subject are evident throughout the text, making it a must-read for enthusiasts of the sport and academics alike. Through his work, Westra provides a bridge between past and present, shedding light on the significance of kaatsspel within Frisian culture and beyond.