Linked :: by Albert-Laszlo Barabasi
An in-depth exploration of how networks work and surprising insights into how they are part of our lives.

Freakonomics :: by Steven D. Levitt and Stephen J. Dubner
This is an insightful book that highlights the learnings to be gained when you apply one science (economics) to another (sociology).
The book poses and answers some interesting questions such as: "Which is more dangerous, a gun or a swimming pool?" and "Why do drug dealers still live with their moms?"