The Axolotl Agency adventures continue! The twins, Amethyst and Aqua, are about to have their ninth birthday party! As party preparations are underway, the agency is anxiously awaiting its next big mission. During an agency meeting, Amethyst suddenly hears some strange sounds coming from another part of the lake. The friends must travel to different areas of the lake to investigate. They end up having to put multiple clues together in order to solve this mystery. It seems there is a new addition to the lake! But what or who is it? Help the agency solve this next mission and celebrate the twins' birthday!

This second book in the Axolotl Agency series contains a glossary as well as some study questions for educational purposes. This series also discusses pollution and environmental issues that affect wild axolotls in Lake Xochimilco in Mexico City.

This is a fun, engaging chapter book series about fictional axolotl characters that is great for ages 7 to 11! Kids will love the illustrations as well as the humor, mystery, and problem solving included in each book. Parents and teachers will love the educational aspect that it provides.