Mallory and the Dream Horse — Ann M. Martin

Mallory loves horses. She loves reading about them. She loves writing about them. And most of all, she loves daydreaming about them.

Then Mallory's parents agree to let her take professional riding lessons. It's a dream come true! Mallory is so excited she can hardly concentrate at the BSC meetings anymore. But then the lessons begin and Mallory discovers that dreaming about horses can be a lot more fun than actually riding them.