That's What Frenemies Are ForBy: Sophie Littlefield, Lauren Gershell 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