Hardy Boys 36: the Secret of Pirates' Hill, , Penguin Young Readers Group, Franklin W. Dixon,Mysteries & Detective Stories,JUVENILE FICTION, mystery books;mystery books for kids 9-12;6th grade reading list;5th grade reading list;summer reading for kids;mystery;family;4th grade mystery books;books for 8 year old boys;books for 8 year old girls;mysteries;books for 9 year old girls;books for 12 year old boys;books for 12 year old girls;books for 10 year old boys;books for 10 year old girls;novels;books for 11 year old girls;fiction;books for 11 year old boys;big sister;big brother;books for 9 year old boys;4th grade reading books,, The Hardy Boys, United States, en-UShttps://www.penguinrandomhouse.commystery books;mystery books for kids 9-12;6th grade reading list;5th grade reading list;summer reading for kids;mystery;family;4th grade mystery books;books for 8 year old boys;books for 8 year old girls;mysteries;books for 9 year old girls;books for 12 year old boys;books for 12 year old girls;books for 10 year old boys;books for 10 year old girls;novels;books for 11 year old girls;fiction;books for 11 year old boys;big sister;big brother;books for 9 year old boys;4th grade reading books, [BLURB],[CITY],,books, ebooks, biblet, Book2look