It wasn't "factual" when Comey lied to Trump, telling him he wasn't under investigation.
It wasn't factual, when his FBI lied by ommisision, not telling the FISA Court that the Steele dossier wasn't verified, as it was required to be when the official signs it.
And so forth. Comey was a key participant in efforts to excuse H. Clinton's "server" laxity and thejeopardy of national security, posed by the expected next President.
He was and remains a corrupt dirty cop, and history will show it.
The saying is "the truth, the whole truth, and nothing but the truth." Comey did not observe this.
Comey's book is "halfactual," insofar as it seeks to mislead, omit and cover his sorry criminal rear.