Sworn to be His (The Archer Family, #3)

Jade Lockhart has always considered herself a top-notch detective...except when it comes to figuring out men. This time, though, she's sure she's cracked the case. In order to win over the guy of her dreams, she has to get him to notice her. If she can just convince her best friend, Derrick, to pretend to be her oh-so-loving boyfriend, the guy should be putty in her hands. It should have been an open and shut case, but when she questions whether the fake affection could be something more, Jade finds herself embroiled in a whole new mystery...Derrick Archer is not the kind of guy who gets warm and fuzzy, but when his best friend needs his help, he manages to find a soft spot in his heart--even if her plan is completely insane. Still, as he and Jade slip further down the rabbit hole they've created, Derrick soon finds that his romantic interests may be the least of his problems...