Skip Memoir of a Geisha. There's at least one part unsuitable for a 7yo (not a bad read for an adult though).

Look for Newberry Award winners, honor books, runners up, etc. Usually the content is complex and the stories are entertaining. Virginia Reader's choice books are another place to look. The American Library Association also grants awards to good books.

Last edited by keet; 04/02/13 04:58 PM. Reason: added some more