According to an excerpt from the book published by The New York Times, Comey said that Trump "is unethical, and untethered to truth and institutional values.
“His leadership is transactional, ego driven and about personal loyalty,” he wrote.
Comey was fired by Trump last May. In his book, written after serving under two previous administrations, details conversations with Trump about the Steele dossier for the first time. The information gathered by former British spy Christopher Steele on Trump includes alleged interactions between Trump and prostitutes in Moscow in 2013 that the Russians had allegedly filmed.