The Post and CNN said the author of the book will remain anonymous.
On September 5, 2018, a New York Times article titled "I Am Part of the Resistance Inside the Trump Administration" saw an anonymous senior official pledge to the world that patriotic stalwarts were working behind the scenes to blunt the most extreme manifestations of US President Donald Trump's capricious leadership, directing his erratic outsider rule toward productive ends.
After the op-ed was published, President Donald Trump blasted it as "gutless", tweeting, "TREASON?".
According to Latimer, his client turned down huge sums of money for the book and plans to give away a large chunk of what is made from sales.
CNN has exclusively obtained a cover of the book, which has been a closely guarded secret until now and will be released November 19 by Twelve, a division of the Hachette Book Group.
White House press secretary Stephanie Grisham, in response to the publisher's announcement, said in a statement, "It takes a lot of conviction and bravery to write a whole book anonymously".
The book will not reveal who the author is but will reportedly lay out "the reasons for their anonymity".
A representative for the book's publisher did not immediately respond to EW's request for comment, though the title also shows up on Amazon for pre-order. "The author feels their identity is nearly irrelevant because there is scarcely a sentiment expressed in this book that is not shared by numerous others who have served and continue to serve this administration at its highest levels".
Latimer and his business partner Keith Urbahn also represented former FBI Director James Comey and former Trump aide Cliff Sims in their tell-all book deals.
He said that the term "senior administration official", in the newspaper's view, was "used in Washington by both journalists and government officials to describe positions in the upper echelon of an administration, such as the one held by this writer". "It has been written as an act of conscience and of duty".
"The author feels their identity is nearly irrelevant because there is scarcely a sentiment expressed in this book that is not shared by numerous others who have served and continue to serve this administration at its highest levels", Latimer said, according to The Washington Post.
"The dilemma - which [Trump] does not fully grasp - is that numerous senior officials in his own administration are working diligently from within to frustrate parts of his agenda and his worst inclinations".