Action/Adventure Story: At the end of the first European expedition, Janice had vowed never to go make another trip. Bobbi wanted to return and the Trio prevails with new narrators, Andy and Charlie. The adventure continues. To understand all of this story, it's a good idea to read at least Book 8 but each storyline stands on its own. As always, it's about the people but the trips are interesting to ponder. There is a reasonable bit of romance but no explicit sex.