The author writes all his personal knowledge, experiences and 100% true information about Demons, Pains and diseases in this book. The author suggested several practical ideas and theories for common people and medical science, how they can learn and handle by themselves, by using his, this and next book about the invisible world of the Demons, Pains and Diseases. The author is 100 % sure that after reading this and next book, everyone will be aware and will be able to control the invisible parallel world around them. If people will be ready, the author believes that, in next book, he will write clear instructions for individuals, how they can communicate with the demons around them. How to make demons around them, their friends. And how to ask demons to do some stuff for them. Author will describe in more details, how much stuff, we can expect from our demons friends, to do for us.