Campbell finalist Sarah Gailey's hippo mayhem continues in Taste of Marrow, the sequel to rollicking adventure River of Teeth.

A few months ago, Winslow Houndstooth put together the damnedest crew of outlaws, assassins, cons, and saboteurs on either side of the Harriet for a history-changing caper. Together they conspired to blow the dam that choked the Mississippi and funnel the hordes of feral hippos contained within downriver, to finally give America back its greatest waterway.

Songs are sung of their exploits, many with a haunting refrain: "And not a...