Another Fine Myth/Myth Conceptions 2-in1

After the murder of his master Garkin, Skeeve, an apprentice magician, joins forces with a demon dimension traveler named Aahz in Another Fine Myth, while in Myth Conceptions, as Court Magician to Rodrick the Fifth of Possiltum, Skeeve must oppose the universe's mightiest invading army, without the aid of Aahz, who lost his sorcerer's power, in an entertaining omnibus edition. Reprint.