book based off warrior cats made by Erin hunter,but ill be making my own warrior book

After a few weeks off, Ty returns to Heartland Ranch with a friend. She's pretty brunette, Blair Conner. Ty's longtime girlfriend Amy is not happy to see Blair. Things get worse from there, Ty & Amy break up, and he moves away........to another country. Amy has no idea where Ty is. Will she climb 100 mountains to find him?? Only love knows.