That's What Frenemies Are For

In this razor-sharp novel for fans of When Life Gives You Lululemons, a Manhattan socialite turns her spin instructor into a fitness superstar to impress her friends. But can she keep her little project under control? Or has she created a monster?

Julia Summers seems to have it all: a sprawling Upper East Side apartment, a successful husband, and two adorable children attending the best private school in the city. She relishes wielding influence over her well-heeled girlfriends . . . but he...