Where to find all the books. Spoilers, obviously but if you just can’t find that one book, this guide is here for you.
Misc
I highly recommend putting your first perk point in concentration. It makes finding hidden objects like this and dropped weapons much easier.
Some book descriptions are funny if you read them.
How does a book on plants give you an edge in mining?
A book by the famous alchemist, Nicolas Flamel gives you…. sewing advice?
Crafting
Book not found
Fire Starting
On a rock near two dead explorers.
Red island
Unlocks Wood Chips recipe
Cooking
Book not found
Skinning
Book not found
Throwing
Deep in the Windy Island cave, near a dead explorer.
Windy Island
50% chance weapon takes no damage when throwing.
Shooting
Near a dead Spaniard
50% chance ammo takes no damage when shooting
Strength
Inside the half boat on the shore.
Copper Island.
Can carry items while sprinting.
Athletics
On a rock in the middle of a small pond.
Island of Hope
50% reduced fall damage and injury
Swimming
Inside the sunken ship.
Island of Hope, sunken ship
Can sprint while swimming
Drying
Found outside under a broken windmill.
Windy Island
Dried food does not cause food poisioning
Mapping
In a mapping tree
Copper Island
Unlocks Mapping Tower recipe.
Sailing
Left passageway of the Santa Maria
Santa Maria
Duration of fast travel is reduced by 50%
Fishing
Under an archway, near a chest.
Island of Hope
Unlocks Leaf Bait recipe
Repairing
In a tent at the abandoned explorer’s camp.
Copper island
Reduced repair duration also applies to vessels.
Medicine
Inside the Lonely Rock, right before you ascend.
Lonely Rock
Living Water cures diseases.
Gathering
Near debris under an archway, close to the fire starting book.
Red island
Thanks to CoLS Firestar for his great guide, all credit to his effort. you can also read the original guide from Steam Community. enjoy the game.