I was a child of ~9-10 years old when I read this back in the early to mid-nineties. The book revolves around a boy who is taken to a home for children. Strange things begin to happen and the boy realizes that the home has a dark side.
I honestly remember very little (except for the fact that I enjoyed it), but I do remember a demonic twist to the story (not necessarily a religious bent though.) I recall gargoyle like creatures and that the children at the home began to disappear. I believe that they would reappear later, though seemingly they had been brainwashed.
That's really all that I recall, I hope it's enough to spark someone's memory.