This is the first book I've read in the 'Replica' series. It was a good book and I plan on reading others.
The main characters are Amy, Andy, Eric, and Chris. Amy, Andy, and Chris are clones. Amy and Andy had their genes altered so they never get sicks and stuff, and Chris is just a normal clone of his Father.
These people otherwise known as the orginization are after them to create a race of super human beings to take over the world.
They had these tracking devices stuck in there heads in another book so they go into a game to get rid of them.
When they get out of the game they find out that Chris's foster parents are part of the orginization.
At the end, Andy decides to go on a mission to find the orginization and Chirs volunteers to go with him.