Winterborne Home for Vengeance and Valor

This story has a Miss Peregrine/Mysterious Benedict Society vibe.  Five children are invited to move into an orphanage, owned by an incredibly wealthy family who suffered a huge tragedy and who is hiding secrets.  As author Stuart Gibbs says, "It's Batman meets Annie."  April is one of those children.  She was left by her mom with a key around her neck that just so happens to have the crest of the wealthy family.  What follows is a thrilling mystery of a key, a long lost billionaire and a hidden treasure.  Throw in a scary bad guy, spunky kids, and great cliffhanger and you have got yourself a great read!  (FIC CAR)