Ya fiction series with a horse, rich girl has an accident and can't ride. Her rich grandmother buys her a brand new Datsun (car), so she's at least 16 or 17, set in the 70s or 80s, published during that period. I think she was nasty to a few girls and tries to make up for it after the accident. I think she may have been in a coma. Her boyfriend might have cheated as well. I think it had a yellow cover with the old style oval centre that contained the image. I think she had a rich sounding name, Courtney or something but I'm not 100% on that. The horse accident was bad and she desperately loved her horse but was too afraid to ride it. I read this series in the late 80s, early 90s, but my sister threw them out before I could finish them. I never forgave my sister, who dares throw out a book? The books were paperback, they had maybe 100 to 150 pages, so not very thick. From the content, I think they were targeted towards ages 16 and up. I think the girl went to college as well. Her grandmother was some type of business woman.