Edgar Rice Burroughs is timeless! Lupoff's book isn't, though.
There's a lot to like here, especially for somebody like me who has been maintaining a Burroughs obsession for like last 18 years or so. Lupoff devotes whole chapters to significant series, like Barsoom, Pellcuidar, Caspak, Amtor, Moon Maid, and, inevitably, Tarzan.
Lupoff gushes appropriately over first entries and is frank about which sequels displeased him. For some reason he's altogether unimpressed with the Carson Napier series. In fact, he goes into great detail on the theoretical “feud” between Burroughs and Otis Adelbert Kline and ultimately exposes it for the falsehood it is... only to later write off Burroughs' Venus series as having been instigated by Kline anyhow.
There seems to be an earnestness to cover the author's entire output, and we even get to hear about the 1963 opening of Burroughs' safe and the various unpublished manuscripts in it (I'm pretty sure they're all out there to be purchased now, I've read some). The 1960s ERB re-discovery and explosion of reprints would seem like a natural time to write “Edgar Rice Burroughs: Master of Adventure”, although that's also a limiting factor in the perspective here.
I've never investigated the Tarzan series beyond the first two books, so it was kinda nice to hear about the other 25 books, or however many. There's a lot of rage from Lupoff and others about how the films and such give people the wrong impression of the character. I have to agree that Tarzan is fairly abused, since there appears to have been at least 1 Tarzan film for every decade since the character appeared, sometimes two. I remember being 18 and reading “Tarzan of the Apes” and then seeing that damned Disney version and screaming “Wrong wrong wrong!”
Lupoff addresses some things I've noticed about Burroughs, including the tragic anti-communist trend, although Lupoff is writing during the Cold War, so he thinks it's swell. Although he did open the topic of varying Burroughs controversies and reasons his books have sometimes been banned (I guess he was too “gory” for some. Screw them, give me those rivers of blood!).
Over the course of numerous forwards and introductions, Lupoff points out that some fans responded negatively to this books, as it isn't unbridled praise for ERB and all things ERB. Naturally, I also found room to differ with him. Lupoff seemed to think it was fine that the Barsoom series put John Carter in the background in favor of substitutes (Carthoris seemed pretty cool in “Gods of Mars”, so why is he such a dull lead in “Thuvia: Maid of Mars”?). He also has annoying habit of writing off the 40s sequels as “merely series of novellas” even though they hang together better than some of the other stuff (“Llana of Gathol” is and always will be better than “Thuvia”).
Oh! And for some reason, when discussing possible sources for Tarzan, for some reason Lupoff never thinks to mention William Tillinghast Eldridge's 1910 “The Monkey Man”.
Lupoff does reference the store Burroughs kept in 1898 and how he was able to obtain any book or magazine (per his ad), which puts the Edwin L. Arnold books back on the table as possible influences for Barsoom.
Anyhow, this wasn't perfect, but is you wanna read a whole lot about Burroughs and his various series (and a pretty exhaustive publication history of everything), this is worth the trip.