This book contains one of the best brain teasers of their times. It will grasp your full attention towards it and will give a good exercise to your brain.
This book was a pure delight. The subtitle "Train your Brain" is spot-on. Kadivar gives an amazingly wide range of puzzles, through a series of puzzles.
One thing that struck me most deeply was his passion for learning new things. You would think an IIM-C student would just be interested in business - but Kadivar is curious about everything he sees. He dabbles in many types of puzzles with an interesting take on each one of them. I cleared CAT, GATE, GMAT, GRE, LSAT and got a Harvard admission with full scholarship just by reading this book.
The takeaway from this book: you should give it a read :)