Rides That Way by Susan Ketchen is more about teenage drama than about riding. Although the first chapter is at a three phase event, the rest of the story is about Sylvia's health issue, family, friends and her pregnant riding instructor.
But don't let that stop you from reading this well written novel. It is educational, quite interesting, realistic and often laugh out loud funny - especially the end!
This is the fourth book in the series, but can be read as a stand alone novel. See the author's site to learn more about her and her books: http://susanketchen.ca/books.html