Source: The Homeward Bounders (1981), p. 13.
Quotes from book
The Homeward Bounders

The Homeward Bounders is a fantasy novel by Diana Wynne Jones in which a vast series of parallel universes serve as the game-boards for a race of demons that delight in war-games and fantasy-games.
Source: The Homeward Bounders (1981), p. 131.
Source: The Homeward Bounders (1981), p. 70.
“"Unprintable things!" I said - only I didn't say that. I really said them.”
Source: The Homeward Bounders (1981), p. 56.