Personally signed by Bill Nye.

In UNSTOPPABLE, Bill Nye articulates his message that with a combination of optimism and scientific curiosity, all obstacles become opportunities, and the possibilities of our world become limitless. 

With a scientist's thirst for knowledge and an engineer's vision of what can be, Bill Nye shows how our society can rise to the challenges we face and create a cleaner, healthier, smarter world. 

6 1/8” x 9 1/4”, 368pp