From the Introduction:

..". this book is being written for the beginner practitioner. I will assume your knowledge of the subject is limited and will thus offer a simple, step-by-step guide to leaving the body. Although 'astral projection' is often used as a catch-all term for any conscious activity occurring outside the body, throughout this work I will make a clear distinction between etheric projections and astral projections (etheric projections being the most common, at least for me).

"By applying the same techniques I use, I believe that anyone can achieve the...