"Siege: Trump Under Fire" is the Sequel to the Bombshell Bestseller "Fire and Fury" by Author @MichaelWolffNYC

Michael Wolff, author of the bombshell bestseller Fire and Fury: Inside the Trump White House, once again takes us inside the Donald Trump presidency to reveal a White House under siege.

Michael Wolff — who enraged President Trump with his international bestseller "Fire and Fury: Inside the Trump White House," about pandemonium in the first-year White House — will be out June 4 with a sequel, "Siege: Trump Under Fire."

The book, "about a presidency that is under fire from almost every side," begins with Year 2 and ends with the delivery of the Mueller report. The publisher says: "'Siege: Trump Under Fire' reveals an administration that is perpetually beleaguered by investigations and a president who is increasingly volatile, erratic, and exposed."

"Fire and Fury: Inside the Trump White House" sold more than 4 million copies in all formats worldwide, according to Henry Holt, which is publishing both books.

Publishing sources say "Siege: Trump Under Fire" is about what Wolff considers the insurmountable legal, personal and political challenges ahead of Trump — about everybody coming after him.

The publisher says Wolff interviewed 150 sources for the new book. We're told the two key groups of sources were former senior officials, and acquaintances outside the White House who talk to Trump at night and that more than two-thirds of the book's essential sources talked to Wolff again. Indeed, some of them sought him out, knowing he was working on what was being called "Fire and Fury II."

Wolff didn't seek an interview with Trump in an effort to avoid legal action that might delay the book. Trump threatened to sue to stop publication of "Fire and Fury: Inside the Trump White House," which he called a "phony book." That backfired and stoked sales.

With Fire and Fury: Inside the Trump White House, Michael Wolff defined the first phase of the Trump administration; now, in Siege: Trump Under Fire, he has written an equally essential and explosive book about a presidency that is under fire from almost every side. A stunningly fresh narrative that begins just as Trump’s second year as president is getting underway and ends with the delivery of the Mueller report, Siege reveals an administration that is perpetually beleaguered by investigations and a president who is increasingly volatile, erratic, and exposed.