Book #1
Depending on your point of view, THE CITY OF THE BEAST is either homage to, or plagiarism of, Edgar Rice Burroughs' PRINCESS OF MARS. Moorcock does a terrific Burroughs impersonation, for better or for worse, though the world-building here isn't as good, even if you put aside how derivative it all is. On the other hand, Moorcock improves upon certain of PRINCESS OF MARS' plot defects: for example, by providing a scientific explanation for how the hero, Michael Kane, suddenly found himself on Mars (malfunction of a STAR TREK-esque transporter beam) and how he came to be so handy with a sword (qualified for the Olympic fencing team). There is nothing particularly novel or exciting about this story or its characters, but, in true Burroughs's fashion, it remains just engaging enough to while away the time, especially if you aren't in the mood for contemplation.
Book #2
These KANE OF OLD MARS novels may be total rip-offs of Burroughs' BARSOOM series, but they are also a rare instance in which the rip-off is as good as (or better than) the original. (Not that JOHN CARTER set the bar very high.) Moorcock perfectly mimics Burroughs' breathless style of adventure storytelling--both its positives and its negatives--to the point that I already have difficulty remembering which exploits correspond to which hero. LORD OF THE SPIDERS is full of action and interplanetary adventure. It's also loaded with eye-roll-inducing coincidences and one hell of a deus ex machina. Dumb, brawny fun, at best.
Book #3
This is the third and final adventure of the legendary Michael Kane (not to be confused with British actor Michael Caine, whose voice people love imitating on late night talk shows). If you've read the previous two novels in the trilogy, you know exactly what to expect. The first half of the book made me think that Moorcock was improving at this type of storytelling, but it turns out he was just saving the really dumb stuff for later. This series never stops feeling like a rip off of Edgar Rice Burroughs' JOHN CARTER stories, but one can't really complain, since the JOHN CARTER books borrowed so heavily from Edwin Lester Arnold's GULLIVER OF MARS. There's not much one can say about MASTERS OF THE PIT. Michael Kane fights the bad guys, gets captured, escapes, fights other bad guys, gets captured, escapes, fights other bad guys, gets captured, escapes...and so on and so forth. It's entertaining enough, but not something you'd go out and recommend. Interestingly, this book attempts to soften Michael Kane's image a bit, as though Moorcock were starting to feel guilty about the level of violence in these tales. At one point in the narrative, Kane insists on abandoning the capital city rather than kill the human zombies that are bent on invading it. Since this is your typical pulp novel, such noble intentions inevitably pay off in the end. Unfortunately, deus ex machinas aren't so common in real life.