What is the climax of the lying game?

there's a lot of good parts in the book, you shod read it. its very hard to explane.

Its about a girl (emma) with a long lost twin. When she gos to meet her in the woods by her hose, somone anbushed her and told her "suttens (sutten= her twin) dead and keep playing sutten or your next".

she keeps playing sutten and she meets suttens secret boy friend and he knows shes not sutten, so him and emma try to find who killed or has sutten.

the t.v show is diffrent then the book tho.