Other holdings on the seven foremost authors (G. K. Chesterton, George MacDonald, Dorothy L. Sayers, and Inklings Owen Barfield, C. S. Lewis, J. R. R. Tolkien, and Charles Williams) include letters, manuscripts, audio and video tapes, artwork, dissertations, periodicals, photographs, and related materials.
The Marion E. Wade Center at Wheaton College (Illinois) is a special research collection of papers, books, and manuscripts, primarily relating to seven authors from the United Kingdom: C. S. Lewis, J. R. R. Tolkien, G. K. Chesterton, Dorothy L. Sayers, Charles Williams, Owen Barfield, and George MacDonald, as well as C. S. Lewis's wife, the poet Joy Davidman.
Owen Wilson | Owen | Michael Owen | Wilfred Owen | Richard Owen | David Owen | Owen Sound | Mark Owen | Clive Owen | Owen Pallett | Owen Wister | Owen Tudor | Owen (band) | Russ Owen | Robert Owen | Owen Sheers | Owen Moore | Owen Dudley Edwards | Thomas Owen Clancy | Owen Spencer-Thomas | Owen Hall | Owen Barfield | Jonathan Owen | Jenny Owen Youngs | Robert Dale Owen | Rena Owen | Owen Smith | Owen, Germany | Owen Chadwick | Dame Alice Owen's School |
Other books include The Beaten Path: Field Notes on Getting Wise in a Wisdom-Crazy World (William Morrow, ISBN 978-0-380-97822-9), The Monkey in Art, and This Tree Grows Out of Hell (Sterling, ISBN 978-1-4027-4882-0), a spiritual history of Mesoamerica heavily influenced by the thinking of Ken Wilber and Owen Barfield.
With Arthur Zajonc, McDermott is co-founder of The Owen Barfield Graduate School of Sunbridge College, is the founding chair of the board of Sophia Project (two homes in Oakland, California, for mothers and children at risk of homelessness), and has been chair of the board and president of many other institutions.