Books like Heart-beast by Tanith Lee

In a dystopian upper class society, Jane discovers a pleasure robot that may possess more than engineered function, raising questions of love between human and machine.

https://en.wikipedia.org/wiki/Death%27s_Master

Cicely Watson is trying to move on, away from her old life and into her life as a vampire. Maybe she can protect her friends and get close to Ander, her love. Things get complicated when Ander meets a new girl he can't resist and Cicely finds she does have feelings for Luke Marianez, the handsome vampire prince. When the enemy captures someone she loves, Cicely is forced to choose, and true love may be caught in the crossfire.

Awakened in a dormant volcano, a woman with no memory finds herself in a brutal ancient world ravaged by pestilence and cultural devastation. Forced by the mysterious Karrakaz to seek a jade key to her identity, she sets out on a timeless quest.

A gripping fantasy‑horror adventure, the second volume of Tanith Lee’s series that follows the ancient Beast stalking generations of the unlucky and unwary.

"Melanie is a twenty-five year old chemist who has spent all of her adult life slaving at school. With her PhD in hand, she's to start her dream job, but before she does, her friend persuades her to relax and try to live again. A blind date set up through her friends seems like the perfect solution. Melanie can take one night away from the lab and let her inner vixen out on a fixed blind date - a chance to get crazy with a perfect stranger. The gorgeous hunk she's to meet exceeds her wildest dreams - but he is more than what he appears and Melanie's analytical mind goes into overdrive. Kade, a slightly older werewolf (at over one hundred years), needs a night way from the Pack. Too many responsibilities and one near miss with a potential mate made Kade hide in his work, the only peace he can find. His brother convinces him to meet the sexy woman for a one night of fun. What could it hurt? But when he finds this woman could be his mate, can he convince her to leave her orderly, sane world and be with him and his wolf-half, for life?"--Publisher's description.

Mimosa, one of the last aromateurs, balances a lonely destiny of crafting love elixirs with her dream of a normal high‑school life, only to find romance—and risk—storming in when she accidentally spoils a potion.