US President Donald Trump on Thursday dismissed an upcoming book on his campaign and administration as "full of lies" and invented sources, after unsuccessfully attempting to block its release.

"I authorized Zero access to White House (actually turned him down many times) for author of phony book! I never spoke to him for book. Full of lies, misrepresentations and sources that don’t exist," Trump tweeted in reference to Michael Wolff's "Fire and Fury: Inside the Trump White House."