Blart III: The Boy Who Set Sail on a Questionable Quest is a 2008 children's novel by Dominic Barker. It is the sequel to Blart: The Boy Who Didn't Want to Save the World and Blart II: The Boy Who Was Wanted Dead or Alive - Or Both. It was described as "ridiculously enjoyable" by Bookseller magazine and as "hilarious" by Julia Eccleshare on Love Reading 4 Kids.