There are a few different versions of The Master Key - they take the core lessons and add value in the form of commentaries, study questions, and lesson plans. You may be able to get everything you need out of the core lessons, or you may find that it is more efficient to look at some of the value-added versions below.
Hard Copy Books:
- The Master Key System
(Softcover)
- Master Key Arcana
- The Master Key Workbook
- The Science of Getting Rich by Wallace D. Wattles AND The Master Key System by Charles F. Haanel
Other Sites: There are other websites that present value-added versions of The Master Key. Some are: