Start with high-confidence erotica books, then narrow by subgenre or adjacent topics.
Eleven Minutes
Paulo Coelho
The Bride Stripped Bare
Nikki Gemmell, Alice Frayn
Extra Marital Affairs
Relentless Aaron
Twin Fantasies
Opal Carew
Naughty
Velvet
Six
Pleasure Bound
Secret Weapon
The Sluts
Dennis Cooper
Playing in the Dark
David Rivera
Dirty Pretty Things
Michael Faudet
Obsession
Shakir Rashaan
Reckoning
Anything for You
Rachel Kramer Bussel, Sophie Atwater
Big Book of Bondage
Alison Tyler, Kaylee West
120 Days of Sodom
Marquis de Sade
Justine
Florville and Courval
Gym Boys
Shane Allison
Madame
Sara Cate