First rule: Don't fall in love.

Billionaire CEO Nikolai Zaitsev has used an escort service for years. Maybe he's jaded, but it's easier to pay for intimacy than worry about another partner using him for his money. His latest companion, Corinne, charms him with her stunning beauty and charisma-but when she crawls for him and calls him Sir their first night, his desire for dominance roars to life.

Corinne Ryan is a first-rate escort who knows better than to fall in love with a client. It's the number one rule of this business, and she's already been hurt too many times. But everything changes when Nikolai pulls her into a dark, sensual world with a different type of rules, and she finds herself collared and leashed as his pampered Pet.

Each night of pleasure brings them closer, and that most important rule gets harder to follow. As feelings blossom, they both fight to stay within the bounds of client and escort. Can they finally admit they've broken their own rules, or will they lose what's become most important: each other?

The Pleasure Protocol was originally available on Kindle Vella and has received minor updates to be published in novel format.