Trouble at Mercy Ranch (Diablo #17)

the long version

Ricki’s friend Beth has a crush on their new classmate Logan, who just moved to town from New York City. When stories start flying that Logan has a reputation as a troublemaker, Ricki takes an instant dislike to him. Not even the fact that he owns his own horse can convince her that he’s a good person at heart who’s trying to put his past behind him. One day as she’s out for a ride on Diablo, Ricki even sees Logan hit his horse! Then bad things start happening at Mercy Ranch, and Ricki’s friend Cathy gets blamed!