In his book Cosmic Voyage, Courtney Brown claimed to have used remote viewing to validate the existence of one of the ultradimensional species mentioned in the Urantia book, the so-called "Midwayers".
The Midwayers discussion occurs on pages 76-82. Unfortunately I cannot paste that chapter here since the PDF of the book I have is based on a photographic image of the book. But those interested can download the entire text at
http://www.courtneybrown.com/publica...rtneyBrown.pdf .
I personally have only skipped around the Urantia book and read, perhaps, 10% of it. The entires seemed of varying quality to me. Then again, at least to my understanding this was authored by a team consisting of many individuals, so that probably makese sense.