In wartime, should a person help a friend whose parents are immigrants from an enemy nation? That’s the dilemma Adam Pelko has to deal with when he gets a letter from his Japanese-American friend Davi Mori. Adam watched his father’s ship go down during the bombing of Pearl Harbor and now lives in California with his mother and sister. The letter asks the still grieving Adam, who is struggling to cope with a new school, additional family responsibilities, and a tough part-time job, to deliver a note to a relative whom Davi hopes can find his father, confined in a California internment camp. In this initially bracing, though ultimately unpersuasive, sequel to A Boy at War (2001), Adam surmounts numerous obstacles, including the opposition of his mother to help his friend. But under the weight of his family, work, school, and a tentative romance with a slightly older girl, the core and newly resonant issue of knowing when and if loyalty to friend and country contradict, loses its focus and urgency. (Fiction. 10-14)