November 6, 2007
In one scene in the book, one of the characters, Lief, is playing a Game Boy, but is unable to beat it, getting really frustrated. The game is later revealed to be a Zelda game when he angrily questions who "Zelda" is.
If the console is the original Game Boy, the only Zelda game Lief could be playing is The Legend of Zelda: Link's Awakening (otherwise it could be any 2D Zelda game, considering the Game Boy Advance remakes). The question about Zelda might spoof how the games are not titled after the hero, but rather a quite secondary character, and this applies especially to Link's Awakening where Zelda makes no appearance at all.
The writer nor the publisher of Everlost held any right over Nintendo's Zelda, but they only included a minor reference to the game.