The ash house

"When eleven-year-old Sol arrives at the Ash House, desperate for a cure for his complex pain syndrome, he finds a community of strange children long abandoned by their mysterious Headmaster. The children at the Ash House want the new boy to love their home as much as they do. They give him a name like theirs. They show him the dorms and tell him about the wonderful oasis that the Headmaster has created for them. But the new boy already has a name. Doesn't he? At least he did before he walked through those gates..."--Publisher's description.