I've read other books by mediums, psychics, etc. Lippincott's book was straight forward, had no fluff, and led the reader through a progression of what a medium is, explaining the spiritual afterlives, and finally on to his sample contact cases. Doesn't assume any special qualities of his medium-ship but rather explains how all of us possess the inner basics to learn and become mediums.
It's a quick read and gets right to the point.