LEGO MINDSTORMS Robot Inventor Activity Book by Daniele Benedettelli Review by Sanjay and Arvind Seshan, PrimeLessons The LEGO MINDSTORMS Robot Inventor Activity Book by ROBOTMAK3R, Daniele Benedettelli, provides an excellent project-based introduction to the new LEGO MINDSTORMS set launched last year.  The book focuses on seven interactive models: a baseball batter, a paper gobbler, a pinball machine, an electric guitar, a transformer, a turtle, and an arcade game. Each chapter is devoted to one model. Clear building instructions and code are included for each model within a chapter. All his designs use sensors and incorporate interesting features of Robot Inventor. The result is seven fun and interactive projects to inspire builders of any age. Benedettelli's book progresses from an easy first project to more complex building and coding techniques in subsequent projects. The baseball batter is a relatively simple build. The author uses it to introduce Robot Inventor parts and t