action adventure adventureandadventurers adventurefiction adventurestories brothersandsisters children'sfiction cities codeandcipherstories cryptography europe families family familysecrets fiction genealogy historical history inheritanceandsuccession juvenilefiction mysteryanddetectivestories mysteryfiction newyorktimesbestseller newyorktimesreviewed nyt:chapter-books=2008-09-28 orphans scavengerhunts siblings treasurehunt(game) wills