Days of Infamy by Harry Turtledove

Turtledove's latest twist on history has the Japanese invading Hawaii in December 1941. The strategic consequences of the U.S. being backed up against its own West Coast, with most of its navy's aircraft carriers sunk, are too extensive to be dealt with in one novel, and one viewpoint character, Joe Crosetti, is training as a naval aviator for the battles to come.