Usually, when I read books that are part of a series, I prefer to start at the beginning. However, my wife picked this second volume of the author's Myth series up at our local flea market, and suggested that we read it together, so I did. While it makes some reference to previous events, and many of the characters have prior history with each other, it can be enjoyed well enough as a stand-alone.
Set in another dimension where magic, or magik, as Asprin spells it here, (strictly of the incantational sort) operates, this is basically a lighthearted humorous fantasy romp, with no deep messages or symbolic themes. Our hero is Skeeve, a moderately able apprentice studying under Aahz, a demon (in Aspirin's fictional universe, as in Piers Anthony's Xanth, "demon" is simply a term for any member of various magical humanoid species, which aren't inherently evil and have no connection with Satan) who's a "magician," i.e., a sorcerer --but one who's lost his powers for the present. Early on, Skeeve manages to land a job as court magician in the kingdom of Possiltum --only to learn that he's expected to fend off an approaching invading army of invincible size. This, of course, lands the two in hot water (their usual situation, apparently :-)) of a potentially lethal sort; but given the humorous tone of the book, the reader doesn't have any doubt that they'll be able to pull through. The humor is wry and pseudo-cynical, a veneer over an essentially ethical and optimistic outlook; I don't recall laughing out loud, but I did enjoy the read. (For me, one of the more delightful parts was a visit to the "Yellow Crescent Inn" situated in an inter-dimensional bazaar frequented by inhabitants of various worlds, including ours. If you've ever thought the McDonald's chain --for which my wife happens to work :-)-- was getting to be really ubiquitous, you didn't know the half of it!)
There are a variety of secondary characters here, ranging from Skeeve's lovable pet dragon, Gleep, to Possiltum's military commander, the appropriately named General Badaxe. One of the more interesting is a green-haired beauty named Tanda, who's taking time off from her jobs to help Skeeve and Aahz in their jeopardy. The author implies that one of her jobs, at times, is prostitution; but she doesn't behave lewdly here, and though Aspirin's humor can include some mild sexual innuendo, there's no sex (or bad language, either), in the book. Her principal occupation, though, is contract killing --which would make it a real challenge to make her even remotely likable! Surprisingly, Aspirin pulls that off (helped greatly by the fact, of course, that he doesn't depict her at work); she comes across as a loyal friend, and a person with integrity, a sense of responsibility, and a basically kind heart. How she balances those qualities with the demands of her line of work would make an interesting character study, which Asprin doesn't really attempt (as noted above, this isn't a deep work). But he does hint at it when Tanda refuses Skeeve's suggestion that she kill the officers of the invading army; assassins, she says, only take on contracts in personal feuds, never as a part of a war. In her world, the Assassins Guild is a recognized (and, apparently, perfectly legal) professional body with a code of ethics that she takes seriously; she seems to see herself essentially as an honorable, rule-bound professional --a stance that doesn't evoke approval, but can evoke respect.
I've never run across any other volumes of the Myth series in any of the venues where I usually purchase books. But if I did find one, I'd snap it up! If you enjoy humorous fantasy, this book would probably be right up your alley.