I only heard of the Lensman series recently. In his introduction to the copy of Foundation that I just read, Isaac Asimov said he was surprised when his series won the Hugo Award for best series of all time in 1966, because he was sure J.R.R. Tolkien's The Lord of the Rings would win. (This didn't make sense to me, since Tolkien's work isn't sci-fi, it's fantasy, but whatever.) The other series that were up for consideration were Robert A. Heinlein's "future history" series, Edgar Rice Burroughs's "Barsoom" series, and E.E. "Doc" Smith's "Lensman" series.
So when I found a pile of the Lensman books sitting on top of someone's trash while I was out walking the dog, it made sense to grab them.
I felt adrift in this narrative for the first 90 pages. I'm not sure how this novel was constructed, but it feels piecemeal. Triplanetary was published in 1948, with revisions by Smith to make it a prequel to the Lensman series, but was originally serialized in Amazing Stories magazine in 1934.
The first section of the book gives an overview of the Arisians and Eddorians, two alien super races who are good and evil, respectively. The Wikipedia entry for this book currently says that the Arisians resemble giant human brains, but Smith clearly writes that they are "distinctly humanoid," so maybe that changed over time. The Eddorians are nebulous, shifting creatures, and can assume a variety of human forms.
Gharlane of Eddore occupies several nasty humans, including Nero (Wikipedia claims he is Hitler during the section of the narrative that takes place during World War II, but Hitler is never mentioned in Triplanetary).
The reason I felt adrift is because the short sections that take place during the fall of Atlantis, the fall of Rome, the Great War, the Second World War, and World War III aren't really connected in any way. Most confusingly, the Atlanteans possess futuristic technology, such as planes and jeeps. The next bit, in Rome, however, is a straightforward story of gladiatorial combat and a slave revolt.
It wasn't until the meat of the narrative -- the long story called "Triplanetary" -- that I settled in and enjoyed this book in any way.
Smith's prose is clunky, but it's vigorous and exciting enough once the reader finds its rhythm. It's also fun to read such an old science fiction book that contains so many elements that would become standard in space opera; tractor beams, view screens (here called "plates"), force fields (here called "screens"), faster-than-light space travel (here called "inertialess flight"), beam weapons (here called "projectors"), and even a metal planetoid filled with automatons led by a single evil figure (sound familiar, Star Wars fans?).
The science and technology are pretty interesting, too, since they're products of their time. For instance, spaceships in Doc Smith's world run on allotropic iron.
All the elements of Triplanetary that related to the larger series, such as Arisia and Eddore, felt tacked-on, and left me confused. After finishing this book, I still don't know what a "lens" is in Doc Smith's world, or how one might wield it.
I plan to read more of the series, not least because I have the whole stack sitting on my shelf at home, but I didn't feel as if this was a great introduction. Many "prequels" aren't. But if the next couple of books in the series are this slapdash and vague about the big picture, I can't see making it through the entire thing.