The Maze Runner by James Dashner
I loved this book, I couldn't put it down!
Thomas arrives to the Glade in the "box." He has no memory of his past other than his name. The other boys tell him that a new boy arrives on the same day every month. All of the boys are pre-teen or teenagers. None of the boys remember anything more then their name before arriving to the Glade. All they know is they must survive, they need to solve the Maze to go home, and no one should find themselves outside the walls after dark.
The Creators (as the boys call them), sent the first group of boys to the Glade 2 years ago. Since then, some have been lost, some have died, and the others have developed a "do or die" routine to help them survive and find their way out.
Almost as soon as Thomas arrives, it's apparent that he is different. Some boys say they recognize him, although they don't know how. This has never happened before and stirs distrust in some of them. The day after he arrives, they receive another new kid. A girl. The first girl ever. She comes with a warning, everything's going to change and she is the last arrival.....EVER. Soon, it becomes clear that all the rules are changing. It's more important than ever that they solve the Maze and get back to wherever they came from.
This book is full of mystery and action from beginning to end. Leaving you in a cliffhanger, ready to read the next book. The first in a trilogy, you'll want to have book 2 close at hand when you finish this book. Luckily all 3 books are out now and I intend to read them all.