The first details how revolutionary political causes, like Irish Nationalism and the Bolshevik Revolution were exploited by British Intelligence. Also, Occultism was used to this end. Much of Crowley's "Magick" centered around controlling people by *psychologically* obliterating their identity. Crowley basically used same psych control methods that pimps use to control the whores who believe the pimp 'loves' them.
The second details international organized crime and its connection to state-sponsored terrorism, various intelligence communities, various militaries. Prostitution rackets were great informant networks; almost always state-sponsored (e.g. police cooperation, military funding, intelligence community patronage).
Prostitution is the common denominator that links the two books. Very lucrative. To have state funding though, organizers would need to guarantee girls clean-- the most organized international prostitution rings were run by medical doctors. (Ding, ding!) There was a lot of violence in this community. Lot of police protection. Lot of bodies, particularly young female ones. Lot of psychopaths.