The Gibbs triplets' story continues when Sierra, intelligent but inhibited, decides she wants a sexual life. The professor makes a list of five steps for initiating sexual relationships, but before she can put them into practice, she meets Ryder Kane, a former black op and head of a security firm. Soon they are involved in a mystery concerning politics and old secrets, and Sierra's life becomes more excitingand more sexual. The Favor (3) by Cara Summers features a mystery that gets a little confusing in parts. But the dialogue is excellent, showing off Summers' dry humor. Sierra's a strong character, although there are some sexual scenes early in the story that feel forced and rushed.