), 1985 (essays in Dutch on the stages of life with the psychologist Hans van Rappard)* "Robert Van Gulik: His Life, His Work", 1988* "Afterzen: Experiences of a Zen Student out on His Ear", 1999===Articles/stories not included in books===* "Astral Bodies and Tantric Sex.
)* "A Glimpse of Nothingness: Experiences in an American Zen Community", 1975* "Robert Van Gulik: His Life, His Work", 1988* "Afterzen: Experiences of a Zen Student out on His Ear", 1999* "Astral Bodies and Tantric Sex".