I've loved everything Marie Lu has written so I had pretty high expectations going into this book, and it very much exceeded them. This book is action packed, full of awesome characters and cute romances. And seriously one of the best endings I've ever read.
As a programmer, I always have trouble reading books about programmers/hackers and this book wasn't any different. There were weird programming metaphors (Just find the break in the pattern) and the virtual IDEs were just silly (just peel back the world to see the code). But besides the awkward programming scenes, the technology in the book is actually really cool. Warcross isn't just a game. It's brain interfaced VR + AR system that many people wear all the time. The implications of such an AR system were really cool from augmented wallpaper to virtual models advertising clothing shops. This is my literal dream world.
If you like insane tech worlds, bounty hunters with cool hair, and emotional backstories, read this right now (or more accurately, read this on September 12).
Preorder Warcross on Amazon.