Re: Best books for Ki developing, meditation, breathing and exercises?
Tohei sensei's books will definitely explain the difference between ki meditation and ki breathing. But the short is: both types of meditation will help you relax, maintain focus and coordination on mind and body. When breathing is added, you get other health benefits with the meditation. Once you've read the books and have questions, if possible, get an intro to ki aikido from a qualified sensei so you can test the theory. Just my 2cents.