This book is on sale on Amazon for $0.99 (regularly $5.99) 12/31/2019 - 1/5/2020!
A secret mermaid world is only the beginning… Things in Pineapple Cove have just returned to normal, when a giant jelly blob monster attacks. The green fiend kidnaps Kai’s mom and sister, and disappears beneath the waves. With a mysterious note as their only clue, Kai and Delphi must journey to the underwater world of the mermaids and rescue Kai’s family, before time runs out.