What is Mary downing hahn's newest book?

locked. it is about a couple who move into a house and when they close the door they are locked in and they cannot escape because the house is alive and won't let them out. when things couldn't get worse they find out they have 24 hours to find the key hidden in the house or else. and the key is in little molly's room who died 10 years ago and they find molly up there covered in blood and she has the key.