The Intergalactic Bus Trip

by Martin Oliver

Published 30 October 1987
-- Action packed stories of mystery and adventure interwoven with puzzles to solve

-- Great fun for kids to read and decipher


Agent Arthur's Arctic Adventure

by M Oliver and Martin Oliver

Published 1 September 1990
Each book in this series contains an adventure story packed with entertaining puzzles to solve. There are extra clues to help you if you get stuck along the way and answers at the back of each book.