The Lego Ninjago Build Your Own Adventure book - Greatest Ninja Battles is a paperback activity book inspired by the popular Lego Ninjago series. This book allows readers to create their own ninja adventures using the mini Lego figures and illustrations provided. Published by Reiman Publications, L.P. in 2019, this book is suitable for ages 9-12 and contains 352 pages of fiction narrative and creative activities. With a focus on the adventurous genre, this book is sure to entertain young readers and encourage imaginative play.