Karen Bendick Watson (1948 - ) wrote, and illustrated a true story, A Horse Named Summer as a teenager. It’s a true story about her attempts to lease a horse for the summer. She wrote no further books under that name, though did illustrate a few titles.
Finding the book:reasonably easy to find.
Links and sources
Thank you to Lisa Catz for the summary and photograph
Rand McNally, Chicago, 1965, 127 pp, illus the author
True story written by a teenager who leases a horse for the summer. Karen (Candy) Bendick had been having lessons since she was very young. The summer she turns
13, her parents agree to lease Duke for the summer. But things fall through with Duke,
and Candy is disappointed. Duke’s owner recommends a dealer, and Candy falls in love with a horse she names “Sir Summer Salt”, and the story tells of that wonderful summer having a horse of her own, and riding in a horse show. The story offers a lot of practical information on riding and horse care as well.