James Comey's book sells 600,000 copies; will be No. 1 on USA TODAY's best-seller list

Jocelyn McClurg | USA TODAY

Show Caption Hide Caption Comey delivers scathing account of a 'morally unfit' president When James Comey sat down with USA TODAY to talk about his new book 'A Higher Loyalty: Truth, Lies, and Leadership,' he made explosive comments about President Trump. He also delved into the Russia investigation, the Clinton investigation and more.

Former FBI Director James Comey’s memoir sold more than 600,000 copies its first week, publisher Flatiron announced Tuesday.

A Higher Loyalty: Truth, Lies, and Leadership, released on April 17, will land at No. 1 on USA TODAY’s Best-Selling Books list this week.

Flatiron said the book (available in print and digitally) has gone back to press several times, with more than 1 million copies in print.

Comey, fired by President Trump in May 2017, has been on an extensive media tour. In an interview with USA TODAY, he said Trump is "morally unfit to be president" and said he believed it was possible the Russians had compromising personal information about the president.

Trump took to Twitter to lambaste Comey as his book began to make headlines, calling him an “untruthful slime ball.”

Comey’s book is the second this year critical of the Trump presidency to become a blockbuster. Michael Wolff’s Fire and Fury, released in January, was No. 1 on USA TODAY’s best-seller list for four straight weeks.