An Open Letter From The Publisher:

Hello and thank you for your interest in this unusual item.

Please note: Just buying & reading this book won't grant you invisbility.

To gain this outstanding ability, you'll have to be an active & willing user.
 
A good example would be reading a book on learning to play the piano.  Just reading a piano book won't give you the skill.  You would have to practice, following the lesson plan as it takes you from being a beginner to becoming a proficient player.

The Secret of Invisibility requires the same dedication from its students.
 
Modern consumers want instant gratification.  This information can't provide that.  It takes a bit of time to aquire the ability and a willingness to really try before the skill is mastered.
 
Have you read the preview of the book?  A link to a preview of the information is offered below.  I strongly recommend reading the preview before making a decision to purchase.

If you have questions, please feel free to contact me directly.

Bill W. Williams
Publisher, Novel Discoveries