A book about U.S. President Donald Trump that will be published next month is set to reveal the content of a letter North Korean leader Kim Jong-un sent to Trump.
Kim is said to have told President Trump that his father had left a "dying instruction" to not give up the regime's nuclear weapons.
Hong Yoo reports.

North Korean leader Kim Jong-un said his father and former leader Kim Jong-il told him to never to give up the North's nuclear arsenal.
This is what President Trump's son-in-law and senior advisor Jared Kushner told Doug Wead in an interview.
Wead is a professional biographer who is releasing his new book called "Inside Trump's White House" in November.
In the book, Wead cited Kushner when writing about Kim's letter to Trump.
Kushner said Kim's letter shows the North Korean leader wants to be friends with President Trump but it also contained his father's "dying instruction" to never give up their weapons stockpile as it's the only thing that can keep him safe.
Kushner added that denuclearization is not an easy decision for Kim to make since it is related to his father.
Kushner also added that President Trump is like a new father to Kim Jong-un making it harder for him to decide.
If what Kushner says is true, it portrays a different version of the wishes of the North's former leaders than what had been previously thought.
Kim had said during his visit to China last year that it is his consistent position to focus on realizing the denuclearization of the Korean Peninsula was in accordance with the wishes of Kim Il-sung and Kim Jong-il.
In the book, Wead also included an interview with Trump in which he showed off his North Korea policy through the release of Kim Jong-un's letter.
Trump defined Obama's diplomacy with North Korea as a failure, saying Obama was most concerned about the possibility of war with North Korea.
Hong Yoo, Arirang News.