Donald Trump is likely to seek a “reckless deal” with North Korea that would endanger the U.S. and its allies, his former national security adviser warns in a new edition of a book about his time in the Trump White House.

John Bolton, who was part of Trump’s team for his summits with North Korean leader Kim Jong Un in Singapore and Hanoi, made the assessment in the forward of the paperback edition of his book “The Room Where It Happened: A White House Memoir.”