Backster's work became popular and drew public attention, and his findings were similar to the beliefs of Hindus, Buddhists and New Age followers. Some parapsychologists criticized his work, suggesting the results were due to "his own telekinetic abilities". His theory is in books like Peter Tompkins and Christopher Bird's "The Secret Life of Plants" and Robert Stone's "The Secret Life of Your Cells". He was a guest on June 27, 2007, on the evening radio show, "Coast To Coast AM", during which he discussed with host George Noory and with callers to the program his experiments with primary perception and findings of an interconnection between all living cells. He had been a guest several times before on Art Bell's Coast to Coast, as well as on Jeff Rense's radio shows, and has presented papers at many international conferences and meetings as well as those in the US.