Jenni in the Bottle. Sapphire City Series, #9

Jenni has spent centuries trapped in a bottle, granting wishes to a succession of masters. Her latest master Alfonzo, a young king, discovers her. Instead of the wealth and power she expects, Jenni finds herself at a BDSM party where Alfonzo introduces her to a new world. He becomes her Dom, and their relationship starts to evolve into something deeper, but Jenni fears what will happen if someone else claims her bottle and enslaves her again.
Determined to break her bond with the bottle, they embark on a journey across Sapphire City, uncovering ancient clues about her curse while consulting historians and exploring forgotten ruins. Their quest takes a dangerous turn when a rival king learns of the bottle and captures Jenni, forcing her to grant three wishes. Alfonzo must infiltrate the rival's fortress to rescue her. Can he rescue her and finally break the curse that holds her bound to the bottle? Will they live happily ever after as Dom and sub, and Prince and Princess?