As House Democrats enter into a second week of impeachment testimony and the party's presidential hopefuls prepared to debate in Atlanta, a new book condemning Donald Trump's presidency was released Tuesday.

"Trump: A Warning" is being published by Twelve, a division of Hatchette Book Group, France's largest publishing company and the world's third-largest trade and educational publisher.

The book's author is anonymous, but, according to ABC News, is a senior Trump administration official who wrote, in 2018, a New York Times op-ed claiming a "resistance" within the administration.

Trump faces tough re-election fight in Georgia, AJC poll finds.

Hatchette is calling the book “an unprecedented behind-the-scenes portrait of the Trump presidency from the anonymous senior official whose first words of warning about the president rocked the nation’s capital.”

»POLL: Georgia voters back impeachment inquiry, unsure about ouster

The author is being represented by Javelin, whose co-founder told CNN the author declined a seven-figure advance and intends to donate some of the book's royalties "to the White House Correspondents Association and other organizations that fight for a free press that seeks the truth."

»MORE: Which presidents have faced impeachment?

Matt Latimer said the book "was not written by the author lightly, or for the purpose of financial enrichment. It has been written as an act of conscience and of duty."

Who's who in Atlanta's Democratic presidential debate Former vice president Joe Biden U.S. Sen. Elizabeth Warren U.S. Sen. Bernie Sanders U.S. Rep. Tulsi Gabbard U.S. Sen. Kamala Harris Tom Steyer Andrew Yang U.S. Sen. Amy Klobuchar U.S. Sen. Cory Booker South Bend, Indiana, Mayor Pete Buttigieg

White House officials have dismissed the narrative. "It takes a lot of conviction and bravery to write a whole book anonymously," press secretary Stephanie Grisham said.