Recs if you like The Deepest Map: The High-Stakes Race to Chart the World's Oceans...

Niche nonfiction, aka micro-histories!

This list was a winner of the Q2 2026 Community Voting event - if you'd like to participate in the Quest, a link is pinned in the comments.

Niche nonfiction books that dads are still likely to enjoy that either 1) are not military history at all or 2) a niche area of a war that is not military history

Nonfiction on a single, weirdly specific topic

Non-fiction books about the ocean and the life within it 💙 From seabirds, whales, sharks and deep sea creatures, all the way to fishing and diving and the ocean as a whole. Perfect as beach reads - or for whenever you have meerweh. These books dive deep - literally. ˙ ✩🫧°🪼˖⋆𓆉°:•.🐠*.•🪸.•:°

Nonfiction books about what happens below: caving, diving, deep sea exploration etc

Nonfiction about the ocean, its depths, creatures, and explorers.