Check out some of Anatoly Zak's books and article, many of them are posted in popular mechanics too IIRC.

And, of course there's http://www.russianspaceweb.com

Asif A. Siddiqi's various books on the Soviet space program (The Challenge to Apollo, The Rocket's Red Glare, Into the Cosmos) are among some of the best sources on the Soviet Cold War space program. Slava Gerovitch has edited an anthology of interviews with participants in the program, Voices of the Soviet Space Program. Olesya Turkina's book Soviet Space Dogs covers the canine contribution to the Soviet exploration of space.