…before mammals, birds and reptiles….still millions of years before the first dinosaurs, it was….
THE AGE OF FISHES

Dunkleosteus – the apex predator of the Age of Fishes
Journey back to the Devonian Period to explore what Earth was like when it was ruled by primitive fishes. Prehistoric creature lovers, ancient monster enjoyers and fish enthusiasts will appreciate this study of one of Earth’s early superpredators.
With striking illustrations and modern scientific insights, this book is the first of its kind, and is sure to capture the imaginations of children of all ages.
A passion project in the works
Hi, I’m Jack Martin, the author of Dunkleosteus–an upcoming book that I will be publishing in late 2025. I am passionate about reading, and I can remember spending long hours at the library as a child reading about dinosaurs.
Today, I am the father of a dyslexic 9 year-old who is obsessed with fish! We make frequent trips to the library to practice his reading and pick out books that interest him…most of these books are about fish and marine life.
When he asked me to search the library catalog for a book about Dunkleosteus, I assumed we’d be able to find one. To my surprise, there were none at any of our local library branches! A quick internet search showed me that the book he was asking for did not exist.

I was shocked that I could buy my son a toy Dunkleosteus at Tractor Supply Company, but I couldn’t find a children’s book on the same subject.
…so I took it upon myself to write that book in my spare time.
Now, after months of research and several re-writes, the book is nearly complete. I have recruited Ukranian artist Oleksii Bychkov as my illustrator, and am working with Gatekeeper Press to self-publish this project later in 2025.
How you can help:
A huge heartfelt Thanks to my contributors! This book is happening because of you, and I’m pleased to announce this project has been fully funded.
I encourage you to buy the book once it’s out! I intend to donate several copies to local libraries, but it will be available for purchase on Amazon and through other distributors.
- Once it’s available, receive an Advance Reader Copy (ARC) eBook and leave a review on Amazon
- Buy a physical copy of the book (once it’s out) and tell your friends!
- Send me an email to encourage me or ask questions!
- Listen to Dunkleosteus – The Song