[2] He authored or co-authored approximately 75 articles in the professional literature and more than fifteen books on a diverse range of topics including psychotherapy, war, cancer treatment, and mysticism.
He taught at Pace College, Roosevelt University, and the New School for Social Research.
[3] In the book LeShan claimed to have tested his hypothesis of "clairvoyant reality".
However, Tim Healey wrote the results were not convincing as nine of his students had eight attempts at using a clairvoyant training technique and all scored four to fives misses.
In the 1980s, LeShan's focus shifted to the psychotherapy of cancer support, a field in which he is considered a pioneer.