The Way of the Ghost is a Ninjago: Masters of Spinjitzu book released in 2015. It comes with a Techno Kai minifigure.
Official description[]
Join the wisecracking ninja on all new adventures in this jam-packed activity book featuring a buildable Minifigure!
The action continues with all your favorite ninja! This activity book comes with a LEGO(R) NINJAGO(TM) Minifigure and is packed with stories, games, and activities about the Masters of Spinjitzu.