She has edited books by Robert Thurman, Ed Brown, Wendy Johnson, Jane Hirshfield, Dainin Katagiri, and many others.

She is a co-editor of the book Opening the Hand of Thought by Kosho Uchiyama, whose teachings she first encountered in the 1980s while practicing at the Pioneer Valley Zendo in Massachusetts under Koshi Ichida.

[2] She completed the certification training required by the Sotoshu at Aichi Senmon Nisodo, a monastery in Nagoya, Japan, where she studied under Shundō Aoyama Rōshi.

She trained finally under Tozen Akiyama at the Milwaukee Zen Center, was ordained by him, and received shiho, dharma transmission, from him in 1995.

Warner has given dharma transmission to four successors: the late Joko Dave Haselwood, who had earlier been a notable publisher of Beat and San Francisco Renaissance poets in the 1960s as founder of Auerhahn Press; Toan Irene Flynn, who teaches Zen in St. Augustine, Florida; and two adjunct teachers at Stone Creek, Annette Joay Lille, a retired hospice chaplain, and Myozen Barton Stone.