|Reclaiming the Power. The How and Why of Practical Ritual Magic. Lady Sabrina. Occult|
"Reclaiming the Power" by Lady Sabrina is a great mid-level guide to Ritual Magick. The material is accessible, but slightly more advanced than a typical 101 style book. Sadly, it is out of print, but used copies can still be found easily.
This book is for anyone who has ever wondered about magic... ever wanted to try it... or even had a goal to achieve. Here, for the first time, ritual magic is laid out for the practical person.