The Fallible Fiend
L. Sprague de Camp
 On the demonic Twelfth Plane the demon Zdim is drafted for a year's indentured servitude on the human Prime Plane, the demon society having an agreement to provide service to human sorcerers in return for supplies of iron, a raw material it desperately needs. Zdim is duly summoned to the Prime Plane by the sorcerer Dr. Maldivius of Novaria. There he strives to do his duty, but his demonic literal-mindedness hampers him. Assigned to protect the Sibylline Sapphire from any trespassers, he promptly eats Maldivius' apprentice Grax when the latter intrudes. Similar misadventures result in the disgusted Maldivius selling his contract, and the demon is passed from one master to another, from circus master Bagardo to the rich widow Roska of Ir, all the while doing his level best to figure out what the muddled humans truly wish of him. Against all odds he becomes a hero when he recruits aid for the city-state of Ir after it discounts intelligence of an imminent invasion by the cannibal Paaluans. Returning to his home plane early and with extra iron, he resolves never again to leave the comforts of the Twelfth Plane — until he realizes how dull it is compared with the picturesque insanity of the human realm... By internal chronology, The Fallible Fiend is the second story in the Novarian series, coming after the short story "The Emperor's Fan", which is set centuries before the others, and prior to the Reluctant King trilogy. (The Paaluan invasion of Ir is mentioned in the second and third books of the trilogy, The Clocks of Iraz and The Unbeheaded King, respectively, as an event occurring either recently or some generations past.) Note: The name of Ir, the subterrranean city-state where much the plot takes place, is simply the Hebrew word for "city" (עיר).