Theron Q. Dumont 
The Power of Concentration [EPUB ebook] 

It is obvious that the person who is best able to focus and concentrate will do the best job. This book is a study guide to concentration. Here you will find twenty lessons that will guide you step by step through what concentration is and how one can achieve it no matter what else is happening. There’s a world out there waiting to be conquered and all you need do is concentrate!