I'm a fan of Marion Zimmer Bradley, but my affection for her rests not on the Avalon books, which I didn't care for, but her Darkover series. Darkover is a "lost colony" of Earth that falls back into a medieval society. Ruled by a psychically gifted aristocracy, after centuries it's rediscovered by a star-spanning high-tech human federation, giving the series a feel of both science fiction and fantasy. Most books focus on the clash between the two cultures. This is no exception, even though set before the time of rediscovery during the era of the "Hundred Kingdoms." Terran Paul Harrell, a doppelganger of Bard di Asturien, is transported to Darkover and right into his war.
Although some of the Darkover books are loosely connected, having characters in common, they were written to be read independently and were written out of sequence. This makes it difficult without a guide to know what story to start with. The books published early are before MZB came into her own as a writer. The ones published after her stroke in 1989 are at the best collaborations; more fanfic of the original than continuations. Two to Conquer was published in 1980, when MZB's powers were at it's height. However, even though Two to Conquer is a very entertaining book, with swashbuckling adventure and romance, I wouldn't count it among the best of the Darkover books. (Although it's far from one of the weakest.) However, I'd suggest the (1979 version) of The Bloody Sun or The Spell Sword and its sequel The Forbidden Tower or The Shattered Chain (my own introduction) or Heritage of Hastur as better starting places. The Darkover series as a whole features strong female characters, but it has enough swashbuckling adventure to draw the male of the species, and indeed this series was recommended to me by a guy (when we were in high school!)
