A. B. Abrams is the author of Immovable Object: North Korea's 70 Years At War with American Power. He has published widely on defence and politics under various pseudonyms, and is proficient in Chinese, Korean and other East Asian languages. He has completed Masters degrees in related subjects at the University of London. Abrams has spent much time in North Korea, studied the Korean language at university in Pyongyang, and has many contacts with Koreans inside the DPRK and overseas.