In his book, God, the Best Seller , Stephen Prothro tells the story of Eugene Exman, responsible for the religious book department at Harper and Brothers from 1928 to 1965. Prothro argues that Exman was partly responsible for the current trend toward “spirituality not religious.” The book highlights Exman’s role in publishing some of the most influential religion books of the 20th century — including The Perennial Philosophy by Aldi Huxley, essays on Zen Buddhism by DT Suzuki, The Long Loneliness by Dorothy Day, and The Religions of Man by Houston Smith. God the Bestseller Harper Collins