The First LEGO League: The Unofficial Guide is a comprehensive textbook authored by James Floyd Kelly and Jonathan Daudelin, focusing on technology and engineering concepts through the use of LEGO models and robotics. Published by No Starch Press in 2008, this guide provides detailed instructions and inspiration for students and enthusiasts alike. With 264 pages and a user-friendly trade paperback format, this book is a valuable resource for those looking to explore the world of models and robotics through the creative lens of LEGO.