Interesting view of the "spy business" circa 1930. How Russia then the URSS recruted young men and a few women from the Eastern European countries to built up their Secret Service. The plot is a bit all over the place, the characters are a bit also all over the place. The main character Khristo is strong, smart and a bit heroic in an Atlantis John Sheppard way (no men left behind, etc). The historical background is amazing in the descriptions, the set-up, the reader is inside the secret services (British, OSS, NKVD and a few others spliter branches. I liked it. It took me more time to read than I would have liked because the plot was not as "thrilling" and this one is not a page turner type of narrative but worth reading at a slower pace.