"Unstoppable: The Incredible Power of Faith in Action" is the non-fiction work of inspirational speaker and evangelist, Nick Vujicic. The author writes of how to do something with your faith, rather than keeping it to yourself and how it benefits both you and the rest of the world. Not to mention God. This is Nick's second book. I have not read the other two. "Unstoppable" is not a biography, though he uses his own life and challenges of being born without limbs as a way to get his message across. The basic theme of the book is "Quit yer whining, ya big baby! I got no arms or legs and I'm on top of the Great Wall of China. Boo-ya!" Only he puts it much nicer. It is a good book, but not one that you can't just sit and read straight through. The ideal way to read it would be a chapter a day. Don't rush it, it will seem boring. If you read it a bit a day, it is much more inspirational. I received this book for free for participating in a book blast for his newest book, "Limitless".