Wolf Boys by Lena Mae Hill

Alarick, Adolf, and Donovan know they’re different.
Though they’re only teenagers, they have the bodies of hulking men, and inside those bodies lives a beast. Growing up in foster care, they learned to hide the presence of their animals, but it hasn’t kept them from being ostracized. Now they live quietly, hiding their monstrous natures and avoiding human contact so they won’t hurt anyone by accident.
But when a man shows up at their work telling them he knows what they are, they have to know more. They accept an offer to Ravenwood Academy for the Exceptionally Gifted, a decision that will change their lives and the halls of Ravenwood forever.