Any good ninja/feudal japan based book for teens you know of?

Im going on a nine hour trop on a plane, plus seven hours to drive to this airport thingy, and need a good book to read! Im really interested in japan and ninja and all that, but don%26#039;t need any manga, cuz i go enough of that! So know any good novels? thnx!|||Across the Nightingale Floor by Lian Hearn, and its many sequels.|||This isn%26#039;t necessarily %26quot;for teens,%26quot; but James Clavell%26#039;s classic %26#039;Sh艒gun%26#039; is set in feudal Japan (around 1600 AD). It%26#039;s an excellent book, and perfect for a 16-hour trip: well-written, engrossing, and long.