Title: Super Training de Apnea®
It's directed towards spearfishers (people with a harpoon who go to fish deep in the sea holding their breath), freedivers who want to improve their apnea skills (holding breath), also is directed towards scuba divers (divers with full equipment) that they want to learn to do apnea or to have the knowledge to do it by their own with security and a protocol.
The book is very educational and explains how to evolute from zero to 100 in apnea and among stand out in results. It's all explained with examples, images, pictures and execises. A part from the theory, the book helps you to program a training plan and gives you access to the web to get some help with other material.
Most revolutionary thing about this book is that gives you a "DRY" training program so you don't have to go to the sea, and the good thing is that everybody says they have amazing results in first week... everybody.
Other important thing is that the book teaches you to use your mind to get concentrated and prepare mentally for this sport. No other method teaches this.
And last thing is that goes progressivesly, from easy things to learn and practice to hard training.
There are very little books in the industry.