Protect this book from dark forces. If it falls into the wrong hands, the knowledge contained within could put all of time and space in danger. LEGO (R) Ninjago: Book of Spinjitzu contains Master Wu's wise lessons in the wonders of Ninjago, giving readers the power to master Spinjitzu and unlock the secrets of this mysterious philosophy. Master Wu has recorded the lessons his father, the First Spinjitzu Master, taught him as a boy and has added to them throughout his life.