This is a good book. There are a few chapters that ramble aimlessly and laboriously, quote unlikely sources (the bible?) or at times overlook the obvious (such as 2112 being based partly on Ayn Rand's novel Anthem). But there are several excellent chapters. These include Fear (Witch Hunt, The Weapon, The Enemy Within) The Mass Production Zone (Grand Designs, The Body Electric, Subdivisions, The Analog Kid, Digital Man, Tom Sawyer) and the final chapter Machine and Man (Red Tide, Manhattan Project, Countdown, Red Barchetta, Natural Science, Hemispheres).
Surprisingly, given the title the book, the author never attempts to briefly summarize Rush's "philosophy" in a paragraph. I'll take my best shot: Most people do not deal in reality...but do not despair. And for god's sake don't mindlessly conform to the masses! Regard the objectivity of natural, observable science and the trial and error experiments of human existence as a foundation for knowledge. Your life's experiences may seem to be dictated by "chance." But in fact, causality works in your favor. Use the volitional power of your mind (reason), the power of your creativity, and take action! Harness chance to your advantage for it is this probability game that enables you the opportunities to mold the world around you.
This is a good book on a great band with the most constructive philosophical "message" of any band or artist in the history of music. An overstatement? Sorry, but you have to admit it's slim pickins' out there.