The Fighters.

They just clicked. Everything seemed perfect, but it wasn't perfect.

"Lemme tell you something" he said.
"What is it?"
"You're not you. You're somebody else. You dont know your past self." He said and I felt every emotion possible.
"Wha-what do you mean?" that's all I could mutter.
"Come. Let me show you who you really are, Sasha Davis." We walked into a room...

To know what happens further, you gotta read the book. ;)
This is a story about two people who met at a club but had something more than just meeting there and having a conversation. They were something more in the past. But she doesnt know. They fall in love. AGAIN> Yes, they were in love before. Everything is a mystery for Sasha Davis. What happens when the mystery unfolds itself? You'll see. ;)