Erak's Ransom (The Ranger's Apprentice, Book 7)

When Erak, the Skandian Oberjarl, is taken hostage during a raid on the desert lands to the south of the Constant Sea, his second-in-command, Svengal, is sent to bring back a ransom for Erak's release. Halt and Will must go with Svengal to deliver the ransom and secure Erak's freedom, but a royal presence is needed too. The Princess Cassandra - or Evanlyn, as Will knows her - persuades her father to let her go with them. Horace and the Ranger Gilan round out the group to make sure that Evanlyn is well protected.

Rain Storm

In Rain Storm, Rain has fled to Brazil to escape the killing business and the enemies who have been encircling him. But his knack for making death seem to have been of "natural causes" and his ability to operate unnoticed in Asia continue to create unwelcome demand for his services. His old employer, the CIA, persuades him to take on a high-risk assignment: a ruthless arms dealer supplying criminal groups throughout Southeast Asia.