Fiction/smut.
I wanted more ethical bdsm rather than the usual capture-and-force-then-stockholm style of story. A quick google search and a skim through some reddit threads later I was checking out the Masters of the Shadowlands series.
Book 1 was okay, book 2 was iffy, starts to get good around book 3. Fast reads. Recommended.

I don’t think I have any real spoilers. But maybe, idk.

Nonfiction. An interesting read although you’re probably not the target audience (I wasn’t).

Nonfiction.
Pretty interesting time capsule of the leather scene between the 70’s and 90’s.

Fiction/smut. Realistic characters and BDSM situations. A crime novel with fun scenes!
Recommend books 1 & 3. Book two gave me the creeps. But it does tie the other books together so not sure if it’s skippable (maybe?).
Some spoilers with alert text, but nothing hidden.

Fiction/smut. Very well written, a relatively good show of ethical BDSM and a new-to-the-scene sub making mistakes.
(Potential minor spoilers, with warnings but not hidden.)