A look into Greber's background proves most enlightening. In 1923, Greber, a Roman Catholic priest, became interested in communication with spirit beings. These spirits often spoke through his wife, a spirit medium, and told him the Bible was full of errors. The Bible clearly forbids all contact with demons professing to bring messages from God. Knowing this, the Society has even attempted to hinder research about Greber by informing inquirers writing them in 1981, that they do not know where his new Testament can be obtained.3 Yet, we have a copy of an official Watchtower letter sent to the Greber Foundation dated December 20, 1980 thanking them for sending their New Testament and a book entitled COMMUNICATION WITH THE SPIRIT WORLD OF GOD.
Good find. My brother e-mailed me this link the other day!!