Graeme Rowland Base (born 6 April 1958) is a British-Australian author and artist of picture books.
The Eleventh Hour: A Curious Mystery was re-released five years later in 1993 with a new, special sealed section in the back called "The Inside Story".
Labelled "TOP SECRET", it carries the paragraph: Within lies the solution to the Curious Mystery of The Eleventh Hour, as well as detailed explanations of all the clues and puzzles in the illustrations.
Do not turn this page until you have tried your hardest to unravel the Mystery – for the getting of wisdom is no match for the thrill of the chase, and those who choose the longer road shall reap their reward!
It includes 16 colour plates of profiles of the half-dog / half-vehicle characters, as they would have appeared in the abandoned picture book, before Graeme decided to instead release the story as a novel for teenagers and younger readers.