Though dated (it was written in 1975) I found this book quite a fun read. The story cuts to and fro between the search for a vietnam pilot lost in action and what he's really doing while everyone is looking for him. The story was clearly written before full details of the harrier jump-jet were released which leads to some big plot holes but it has some lovely twisty ideas in it.

The cover blurb (...story whose artful misdirection will keep your attention rivetted until the very end.) is true!