I really can't remember anything about them, though. I think the first one I ever happened upon in a bookstore and chose on a whim (my grandmother often spoiled me by allowing me to buy ten bucks or so worth of books every time we entered the mall - for my sister it was forty or fifty more dollars than that for the GAP or American Eagle or whatever

) was
Black Gold, which was about horse racing. And come to think, I'm not even 100% positive that was from the same author as you saw in my picture above, much less the same universe as Misty. That's how little i remember. But they all were all about horses, and I was into those books for some reason for a short time somewhere from 8 to 12 years old. Those were the kinds of shorter books that an avid reader of a kid could get through in anywhere from 90 minutes to 4 hours. Maybe 100 to 200 pages.