Fionna & Cake Meet Finn & Jake

"Fionna & Cake Meet Finn & Jake" is a fan-fiction book written by Ice King and was first introduced in Issue 1. In the issue, the book is sucked into the Bag of Holding, when the newly revived The Lich begins his plan to suck up all of the Land of Ooo. The book is likely a sequel to Ice King's first book, Fionna and Cake.

Going by the name, the book is about Fionna and Cake, who both meet Finn and Jake, their male counterparts.