I really loved this book because it's about dolphins!
Here's a short summary: Jody is really exited because she and her family are going to study dolphins on a boat! Then Henry's (the captain) daughter Brittany get on board and starts acting like a brat. On the first day Jody tries to make friends, but no luck. She's also disappointed that she hasn't seen any dolphins. But after dinner she's on deck and finds one! She names him Apollo. Apollo and Jody become friends, as much as a dolphin and human can.
I won't spoil the ending for you, but I will say that Apollo saves Jody's life and she helps his! :)
The dairy entries included made it seem more, well, kind of special.
I also really loved the names Jody gave her dolphin friends!
Brittany WAS really annoying but I think she came through, a little, in the end.
I would definitely recommend this book to anyone who loves animals :)