The Emperor of Nihon-Ja by John Flangan
Again, a book I was pre-reading for Matthew. This one again, I either read to fast or there weren't any curse words. I did notice a character saying "Blast it!" once or twice but no cursing. :-)
The books starts with the main characters separate. Will and Halt are in Toscana (I still haven't figured out where it is) and Horace is in Nihon-Ja. Will, Halt and Alyss are working out a treaty while Horace is learning new sword techniques. Right as negotiations are wrapping up on the treaty, Evalyn arrives with news that Horace has disappeared in Nihon-Ja. Wiil, Halt, Alyss, and Evalyn take off on a Skandian ship to save Horace.
Just like the others in the series, I enjoyed this one and recommend it. I've also heard a rumor that they are making some of the series into a movie. We'll have to see how it plays out.