The Tarbell Course in Magic is a notable encyclopedia of magic amongst professional and amateur magicians. It has eight volumes; the first five were part of the original home-study correspondence course compiled in 1928 by Dr. Harlan Tarbell, the remaining three volumes being added on later. This magic volume series was originally designed as a correspondence course for budding magicians. Once they were collected and bound, the series has become an unparalleled reference standard for magicians. In its impact on the magic world, it is second perhaps in its influence on the art of magic only to Hoffman's Modern Magic, and many professional magicians have based their careers on the Tarbell Course.