Allen, Louis. Burma: The Longest War, 1941-1945. Harry N. Abrams, 2019. London Phoenix Press, 1984.
The Burmese front in World War II is called the “Forgotten War”. In fact it was referred to as this even while it was still being fought. In Southeast Asia, it was the lowest on the Allies’ priorities in supply and strategy. Thus it is often overlooked, though there is sizeable literature on the subject. One of the most valuable sources on this front is Louis Allen’s The Longest War. Allen actually served there as an intelligence officer. With his wartime intelligence work and knowledge of the Japanese language, he not only relied on British sources, but also delved into Japanese ones through archival material and interviews with veterans (there were more survivors from continental than island fronts, as soldiers had somewhere to withdraw if defeated). Thus, unlike many other works on the Burma Campaign, the Japanese side of the story is exhaustively covered.
