Interesting look at the failure of the U.S. "counter intelligence" apparatus as as a result of competition and jealousy among agencies (CIA-FBI-DOA, etc.), immature, gun culture, insecure, "macho," (and, thus, easily seduced "intelligence" agents), in the context of a slow but steady coordinated espionage effort by the PRC (not to mention Taiwan and others.) How an FBI agent ends up sleeping with an "asset" he is assigned to "control," at the same time she is sleeping with a CIA agent, etc. etc. just boggles the mind.
But, while the material is fascinating, the writing is repetitious, lacks dramatic punch, and is not as well organized as it could be (perhaps the result of the style of repeating the same event from different perspectives).