There was a brief mention in an older thread about the Haynes manuals:
I just received the Haynes "Soyuz Owners Workshop Manual" by David Baker, and all I can say is WOW! There's a fair amount of background through Vostok and Voskhod and the development of the "7K-OK" that became the Soyuz we know and love (and I finally understand why it was "7K-OK"), but then Baker really gets into the details. I don't know that I'll necessarily need to know the exact VHF frequencies the radio operates on (though Baker mentions them), but knowing that there's both a shortwave and a VHF system that are in use in recovery operations is interesting. There's enough general detail for non-techies and enough technical detail to satisfy all but the most hardcore. Great stuff. I have the "Gemini" manual on order next, and I have high hopes for it as well.