Christopher Hastings 
Adventure Time #41 [PDF ebook] 

The name is Butler . . . Peppermint Butler. As Director of S.W.E.E.T.S., it’s up to Peppermint Butler to do . . . uh . . . secret agent-y things! On the hunt for the Olyfaunt Drive, he must rely on Finn and Jake after they accidentally send his informant into a gelatinous cube. It’s time for SPY SHENANIGANS!Also featuring the story Dad Olympics !