Road trip! It started out as an impulsive lark for Lily Morrisette, fueled by her strong chemical reaction to sexy Zach Taylor. A tough, blustery, yet tender-in-spite-of-himself career military man, Zach's determined to break up his darling "baby sister" Glynnis's wedding engagement . . . and Lily's coming along for the ride. But there's no Glynnis waiting for them at the end of the line—only a ransom note . . . and a death threat.

Isabelle Flanders Tookus isn't expecting to involve the Sisterhood in a new mission when she strikes up a friendship with a curly-haired boy in her local park. Ben Ryan is eight years old, sweet, funny, and smarter than most adults—a child genius, in fact. He's also in much deeper danger than he realizes. Ben is the grandson of millionaire Eleanor Lymen, who hired Izzy years ago to design an institute for gifted children. Ben's mother passed away...