Gus Openshaw
I haven't read this book or know most stuff about it but i do know that it is about a man who wants to enact his revenge on a whale who killed his Wife and Daughter.
^-- picture from "Behemoth"
Darkwing
I haven't read this book either but i have read other books by the same author, Kenneth Oppel, and have also read the synopsis. It's about a bat that can see in the dark. That's all really can tell you for sure.