The One Dollar Horse (Trilogy)

This book is fantastic and I have recommended it to everybody! Perfect for people who love eventing!

From Amazon:

When Casey Blue's victory at the Badminton Horse Trials earns her and Storm an invitation to the prestigious Kentucky Three Day Event, it is a dream come true. But that dream is about to turn into a nightmare. After her father is arrested for a crime Casey is convinced he didn't commit, she finds herself the victim of a vicious blackmailer. To make matters worse, Storm is behaving like the wild horse he once was. Faced with losing everything she loves, she needs the help of her farrier boyfriend, Peter, to win in Kentucky, one of the most challenging riding competitions there is. But is he for her or against her?