"A common theme [of the book] is the CIA's ability to deceive and propagandize the American public through its impenetrable government-sanctioned shield of official secrecy and plausible deniability.Valentine's book, The CIA As Organized Crime, was published November 28, 2016. This author is a serious journalist who started investigating the agency when "when [then-] CIA Director William Colby gave him free access to interview CIA officials who had been involved in various aspects of the Phoenix program in South Vietnam."
Book Description, Douglas Valentine, "The CIA As Organized Crime"
This is not the work of a conspiracy theorist or part-time hobbyist speculating about Ukraine. Valentine is not only a published author, but a serious and respected researcher. Parts of his work, per the book description, "are archived at Texas Tech University's Vietnam Center, at John Jay College, and at the National Security Archive, in both a Vietnam Collection and a separate Drug Enforcement Collection."
Comment: When it comes to "Sleeper agents" (point #4) either in Ukraine or elsewhere, see: Operation Gladio: How NATO conducted a secret war against European citizens and their democratically elected governments The following is a more in-depth interview with Douglas Valentine: