I have the Millenium edition of this book, which contains the three novels, The Eternal Champion, Phoenix in Obsidian and the Dragon in the Sword. It is a good intro to the Eternal Champion series because it is the simplest. John Daker, moaning that he has many lives, many forms, introduces the true nature of the champion. Yet for me, the Eternal Champion is one of the best switching-sides story. The hero is told by humans that they're the good guys and the Eldren are the bad guys, and so he fights for them. Then he realizes that the truth is the other way around, so he switches to the Eldren and beats the crap out of humans. It makes me wonder, is what we've been taught as right since childhood really right, or are we being deceived? There's some implied philosophy for you. The next two parts are about the other guises of the Eternal Champion. After this, Moorcock has placed the Eternal Champion in every possible speculative fiction setting: post-apocalyptic earth, steampunk, time travel, sword and sorcery, etc. It's a series any questioning hero would love.