These are the books by Martin Booth that are reviewed on this site:
Jet, the poacher's dog, is taken into the army when her owner is sent to prison. She is trained as an infantry patrol dog and sent to France on active service.
Music on the Bamboo Radio
Hiding out with Chinese friends for the duration of the war after Hong Kong surrenders to the Japanese Army, Nicholas Holford becomes useful both to the Chinese Communist guerrillas and the British Army, who are working together against the Japanese.