As much as I love “Fables,” its spin-off, “Jack of Fables,” consistently impresses and amuses me. Since Jack the Giant-killer ditched the rest of those feebs back in Fabletown, he’s lost two fortunes, been kidnapped by and escaped the villainous Revise, and survived having a sword rammed through his torso. In between the frequently engaging and hilarious arcs, Jack occasionally interrupts the action to tell us about his remarkable past. We’ve seen how he became a giant-killer and Jack Frost, but this week’s Halloween-themed issue tells us how Jack became Jack O’Lantern. Like all of Jack’s origin stories, this one highlights how Jack’s wit is both a liability and an asset. The plot involves the sale Jack’s soul to not one, not two, but five versions of the Devil. This issue is a great stand-alone, but the end leads into what promises to be yet another entertaining arc from Bill Willingham, Matthew Sturges, and Andrew Robinson.