I've read several Catherine Aimes books:
A Bracing Life
Braced in Wedlock
Bracing Daydreams
Bracing Times with Cecilia
Headgeared
Living the Braced Fantasy
Love and Braces
Notwithstanding Braces
She's pretty well cornered the (very niche) market on this kind of thing. I think the books are pretty good, though not great. "Bracing Times with Cecilia" and "Notwithstanding Braces" were probably my two favorites. I *really* wish Aimes would hire a copy editor, though. She always has many typos, and the increase in frequency toward the end of the book, like she's in a hurry and just wants to be done.
I'm not sure Aimes has fully wrapped her mind around braces as we see them here on this site, since she's always saying (on her blog) that she wants children/teens to read her more innocent books. But I'm also pretty sure the more adult-oriented books sell better. In the adult books, she'll often throw in unrelated fetish stuff like restraints on the exam chair and occasionally adult diapers, though I'm glad she's gotten away from the latter in recent books.
Anyway, the books are okay, and there's really very little else like them out there.