Many times by book 5 in the series the stories become predictable. It’s easy to fall into a trap of writing a story to appeal to fans without developing the characters and the world more. Not here. –Amazon reviewer

This starts a new mystery to be continued in the next book. There were plot twists, and we saw more of the planet where Cory is living. We are also introduced to some of the natives of the world who have been ignored and slighted by the “more advanced” peoples. Perhaps this echoes the challenges of native peoples on earth. –Amazon reviewer

Ambassador 5: Blue Diamond Sky

Ambassador 5

As Cory takes a well-earned rest and finally submits to proper weapons training, he and a couple of people from his household go on a hunting trip in the marshland between Barresh and the turquoise sea. A bad storm has come through recently and on a deserted beach, Cory finds something Earthly that doesn’t belong there: a message in a bottle, a piece of paper with HELP scratched on it with a sharp object. In Isla.

Cory has a list of all humans in Barresh: it’s very short and no one is missing. A few days later, he receives a curious message through official channels, from a woman on Earth whose rich businessman husband went on a trip of a lifetime “in a place where you can surf with plesiosaurs in turquoise waves”.

Cory knows the guy advertising the trip. He’s a shady character. He also knows where the “plesiosaurs” are. They’re not particularly friendly. Not to mention that the area is on the land of a viciously territorial Pengali tribe.

As it turns out, those are the least of his worries.