Mary O'Sullivan would rather throw punches than parties. But though her vigilante-league family can fly and support collapsing bridges on one shoulder, Mary’s stuck with her wits, muscles, and a desperate need to prove herself. When the league uses her celebrity secret identity to infiltrate a gala, she takes the opportunity to flaunt her skills as an operative. Mary's decision to bend protocol results in the loss of a dangerous artifact — one that could grant her the power she lacks. Sidelined by the league for going rogue, she pursues the power-granting stone without backup. But she's not the only one looking for the artifact. If she can't secure it, superpowers will be available to the highest bidder — and the league's anonymity could become a thing of the past. Power Struggle is a stand-alone prequel to the League of Independent Operatives series.