CFO founder Glenn Clark authored over 50 books and leaflets on the spiritual life.
Over the past 70 years, CFOers have contributed to this body of literature.  

A huge selection of this literature is available for free PDF download on the CFO Literature page of CFOI's website.

Many of Glenn Clark's books, including those that are out of print are available used. Check out our Amazon Book List

Those books that are in print are available through MacPark Publishing