liar part one

ok so ive read a little bit of this book the liar and so far is pretty darn good. The only thing is that its gets confussing with the back and forwardness of it. also i wonder why zack never told sarah why he was dating micah or why zack even dated her. She lies about everthing but i cant wait to read more of this book not to much of a big reader but this book has me on the edge of my seat so far