The Sword Thief: 04/24/13
The Sword Thief by Peter Lerangis is the third of the original 39 Clues series. Armed with the clues found in Italy, the Cahill siblings are en route to Japan.
Although in the post 9/11 word of air travel, stealing seats on an airplane might not be possible, finding Amy and Dan separated from the stuff and their au pair was a dramatic opening. It seems in book three the stakes are higher all the way through. As the siblings dig themselves ever deeper into the challenge, they are forced to take more dangerous risks.
One of things Dan and Amy started to do (reluctantly) in One False Note is allying themselves with other teams. These temporary alliances are a means to an end (either to keep going, avoid the authorities, or in the most dangerous situations — survive).
Alistair Oh returns and they are forced to do some soul searching. His back story is perhaps the most complex so far of any of the Cahills — beyond the siblings' background. His intentions beyond getting to the next clue seem genuine but given previous apparent betrayals, they have to treat his help with caution.