The ISBN of The Outdoor Book for Adventurous Boys is 978-1-59921-341-5.
The ISBN of The Dangerous Book for Boys is 0-06-124358-2.
The ISBN of Boys of Steel is 978-0-375-93802.
The ISBN of Boys' Ranch is 1-84576-931-7.
The ISBN of The Boys from St. Petri - novel - is 0140379940.
The ISBN of Dead Boys - novel - is 0-586-21456-9.
The ISBN of Miracle's Boys - novel - is 0-399-23113-7.
The ISBN of Lost Boys - novel - is 0-06-016693-2.
The ISBN of The World of Normal Boys is 1-57566-661-8.
The ISBN of Raven - book - is 0525241361.
The ISBN of The Gamble - book - is 9781594201974.
The ISBN of Travels - book - is 0394562364.
The ISBN of Babel - book - is 9780399121029.