<B><I>Haven’s Legacy</I></B><B> is the thrilling and heartfelt second book in The Powers, a sweeping middle-grade fantasy series from <I>Supergirl</I>’s Melissa Benoist and her sister, the writer Jessica Benoist. </B><BR/><BR/> When Parker and Ellie McFadden’s mysterious aunt Sadie shows up in the aftermath of the dramatic events at Haven House, they realize their world is about to get a lot bigger. They’ve been invited to join an underground society called the Sentry, a group comprised of powerful individuals tasked with protecting the planet. At Mountain Harbor, a summer training camp for junior members of the Sentry, Ellie and Parker will be given a chance to hone their newly realized abilities in a secure space. It’s what Sadie wants them to do, since she needs their help with an important and cryptic mission as soon as they’re ready.<BR/><BR/> But Mountain Harbor is not what it seems. Though Sadie promised the girls protection, the Danger&md