Korean-American missionary Kenneth Bae, recently freed from two years in jail in North Korea, is publishing a memoir about his ordeal, VOA reported on Wednesday.

Bae was arrested in 2012.

Titled "Not Forgotten: The True Story of My Imprisonment in North Korea," the book is out on May 3, according to publisher HarperCollins.

In a promo video for the book, Bae says he received some 450 letters from around the world while he was in prison, which told him that he was not forgotten.

He went to North Korea in November 2012 and was arrested and sentenced to 15 years of hard labor for "hostile acts" against the state -- code for proselytizing.

He was freed in November 2014 as a result of secret U.S. negotiations with Pyongyang.

