Henry Chung 
The Case of Korea [PDF ebook] 

This volume examines how and why Japan annexed Korea in the early twentieth century and discusses the role of foreign powers (particularly the USA) in trying to bring about freedom and independence for Korea. Written by a Korean living in the USA the book is at times a harrowing account of atrocities committed by Japan against Koreans. Entirely impartial it is obviously not, but it nonetheless covers an important if tragic part of history in East Asia.