Book 2

Charles Preston Puz 2

by Charles Preston

Published 16 January 1987

Book 3

Charles Preston Puz 3

by Charles Preston

Published 23 October 1987

Book 4

Charles Preston Puzzle 04

by Charles Preston

Published 27 October 1988

Book 5


Book 6

Charles Preston Puzzle 06

by Charles Preston

Published 30 October 1989

Book 7


Book 8

Charles Preston Puzz8

by Charles Preston

Published 30 October 1990

Book 10

Charles Preston Puzzle 10

by Charles Preston

Published 27 October 1993