Trench 42

When the underwater exploration station Llyr stops at Trench 42, Amari fears it's going to be a boring stay. She loves spending time with sea life, but the scientists aboard the station aren't likely to let kids share in the precious research time.

Then some minor damage to the station and unusual seafloor tremors point to something strange happening in the waters around the Llyr, and Amari and her twin, Lem, make the discovery of their lives...