Former FBI Deputy Director Andrew McCabeAndrew George McCabeAndrew McCabe's settlement with the Department of Justice is a signal to John Durham Trump criticizes Justice for restoring McCabe's benefits The Hill's Morning Report - Presented by Altria - Jan. 6 panel flexes its muscle MORE accused President TrumpDonald TrumpJan. 6 panel plans to subpoena Trump lawyer who advised on how to overturn election Texans chairman apologizes for 'China virus' remark Biden invokes Trump in bid to boost McAuliffe ahead of Election Day MORE of acting like a mob boss and releasing a “strain of insanity,” according to a copy of his new book obtained by The Guardian.

McCabe alleges in the book that Trump and White House Counsel Don McGahn offered him protection in exchange for loyalty.

“The president and his men were trying to work me the way a criminal brigade would operate,” he wrote.

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McCabe became acting FBI director after Trump fired James ComeyJames Brien ComeyTrump defends indicted GOP congressman Andrew McCabe's settlement with the Department of Justice is a signal to John Durham Giuliani told investigators it was OK to 'throw a fake' during campaign MORE. He also said in the book, "The Threat: How the FBI Protects America in the Age of Terror and Trump," that Trump directed Deputy Attorney General Rod RosensteinRod RosensteinWashington still needs more transparency House Judiciary to probe DOJ's seizure of data from lawmakers, journalists The Hill's Morning Report - Biden-Putin meeting to dominate the week MORE to write a memo to justify the firing.

Rosenstein and the White House both publicly deny that Rosenstein was directed to write the memo, but, according to McCabe, Rosenstein privately said that Trump ordered him to write it.

“He said it wasn’t his idea. The president had ordered him to write the memo justifying the firing,” McCabe wrote.

Then-Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsTrump criticizes Justice for restoring McCabe's benefits McCabe wins back full FBI pension after being fired under Trump Overnight Hillicon Valley — Apple issues security update against spyware vulnerability MORE fired McCabe last year after a Justice Department inspector general report found that he lied about media disclosures. He denied the allegation.

The book is expected to go on sale this month.