Books

You cannot learn martial arts from books alone. However, books are very good for use as a reference to the different techniques and their names. They help in comprehending the system you are training.

Below are some of the books that I have and use to lookup techniques and naming conventions.

Aikido and the dynamic sphere, A. Westbrook and O. Ratti

The Shotokan karate bible, Ashley P. Martin

Shotokan kata up to black belt, Fiore Tartaglia

Karate kata, Roland Habersetzer

Judo, F.M. van Haesendonck