I really enjoyed reading "The Blue Machine: How The Ocean Works".

It turns out the Ocean is fascinating, and I learned something crazy:

"Between 1950 and 1973, world fish harvest trippled, but the amount of fish directly consumed by humans stayed the same. The rest went into fishmeal, as a supplemental food for livestock, and this became an essential ingredient for modern industrial farming".

I didn't realize that fishmeal was a primary input to modern animal agriculture. Global fish stocks collapsed not only because people ate fish, but also because of animal agriculture in general. It's fascinating how it's all connected.

Also, sea turtles cry 8 litres of tears an hour.

Needless to say, this book ended up as a permanent fixture on my bookshelf.