When a package arrives from a deceased game developer, college student Riff Jenkins gets his reward for being one of the top players: a special Grimoire and an invitation to LA's top gaming den. But the Grimoire is more than it appears. When Riff syncs it, he's transported inside the deadly game.
Ready Player One by Ernest Cline
The Hobbit by J. R. R. Tolkien
Dungeons & Dragons Monster Manual by Gary Gygax.