Only the first four volumes of the Legends of Lone Wolf were made available in the United States (though "Sword of the Sun" was divided into two separate volumes, "The Tides of Treachery" and "Sword of the Sun"), and only the first 20 of the core Lone Wolf gamebook series were made available in the United States; the last 8 books were never printed in the US. It should also be noted that the American editions of books 13-20 were abridged versions and thus are shorter than the UK editions. The color maps of the UK versions are rendered in black and white in American editions.