"Finn and Jake wake up in a world that is not quite the way they remember it--more snakes, that's for sure--and it looks like they're stuck here. But where is here exactly? With the help of some fellow friends, Finn and Jake soon discover that they're inside BMO and it looks like BMO is determined to give them the best game of their lives, whether they want it or not."-- Back cover.

Chiefly illustrations.