Start with high-confidence marine life books, then narrow by subgenre or adjacent topics.
Spying on Whales
Nick Pyenson
The Illlustrated Encyclopedia of Fish & Shellfish of the World
Derek Hall, Daniel Gilpin
Kraken
Wendy Williams
Beneath the Surface
John Hargrove, Howard Chua-Eoan
Shark Biology and Conservation
Daniel C. Abel, R. Dean Grubbs
Secrets of the Whales
Brian Skerry, James Cameron
The Ultimate Book of Sharks
Brian Skerry
This Is Not My Hat
Jon Klassen
The Great White Shark Handbook
Greg Skomal
The Shark Handbook: Third Edition
Greg Skomal, Gregory Skomal
The Ultimate Shark Field Guide
Thomas Nelson, Julius Csotonyi
Narwhals and Other Sea Creatures Magic Painting Book
Sam Taplin, Elzbieta Jarzabek
The World Beneath
Richard Smith
