Highly recommended Anatoly Zak has been a long time reliable source of info on Russian space programs for Pegasus
(http://ecx.images-amazon.com/images/I/51Eqbc-z9mL._SX394_BO1,204,203,200_.jpg) (http://www.amazon.com/gp/product/1926837258/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1926837258&linkCode=as2&tag=pegasreseacon-20&linkId=46HO65QZYLKDNL5T)
Russia in Space
by Anatoly Zak (http://www.amazon.com/gp/product/1926837258/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1926837258&linkCode=as2&tag=pegasreseacon-20&linkId=46HO65QZYLKDNL5T)