When a weird, wild wail echoes from the Metropolis Museum, Batgirl and Supergirl rush inside ready for a fight. But all they discover are groggy workers and one ancient tome missing from a rare book exhibit. A moment later, they’re called to a break-in at S.T.A.R. Labs and find... Silver Banshee! The supernatural Super-Villain is scheming to broadcast a mind-control curse over the city! Batgirl and Supergirl are determined to stop the plot, but their foe’s deadly scream makes it nearly impossible to face her head-on. Can the two friends concoct a way to silence Silver Banshee and her spell before midnight? Find out in this action-packed, illustrated chapter book that’s perfect for young DC Super Hero fans!

When Batgirl and Supergirl investigate mysterious tremors in Gotham Bay, they dive underwater and discover... Lex Luthor! The crooked businessman is running a mining operation to dig up deep-sea Kryptonite deposits. But as the two friends battle Luthor and his drones, the green dust that fills the cavern quickly drains Supergirl’s superpowers. What’s worse, the unstable tunnels are at risk of total collapse! Can the girls shut down the Super-Villain’s Kryptonite collection scheme before they get trapped beneath the waves? Find out in this action-packed, illustrated chapter book that’s perfect for young DC Super Hero fans!