Comment by chadash

For a much more in-depth article, I'd recommend Amia Srinivasan's review of two recent books about octopuses at https://www.lrb.co.uk/v39/n17/amia-srinivasan/the-sucker-the.... Of course, the books that Srinivasan reviews go into far more depth than any article summarizing them could, but if you're not going to read the entire books, I think you'll still find this article very interesting.