The Navigator's Daughter — Nancy Cole Silverman

Getting caught in the middle of an international art theft ring wasn't supposed to be part of the deal Kat Lawson made with her dying father. But when her father receives a mysterious letter informing the former WW2 navigator/bombardier that his downed B-24 has been found and asking him to come to Hungary, Kat suspects this is all part of some senior rip-off scam. Her father insists she go, not only to photograph the final resting place of his plane but also to find the mother and son who risked their lives to rescue him and hid him in a cave beneath an old Roman fortress. Kat's trip uncovers not only the secrets of the cave where her father hid and of those who rescued him, but a secret that will forever change the direction of her life-that is-if she can get home safely.