I say Once a Runner ought to be the Old Testament, and Bowerman and the Men of Oregon the New Testament. The book of John (Parker) and the book of Kenny (Moore). Both use mythical anecdotes and memorable dialogue to convey the religious experience of distance running.
"Training was a rite of purification; from it came speed, strength. Racing was a rite of death; from it came knowledge. Such rites demand, if the are to be meaningful at all, a certain amount of time spent precisely on the Red Line, where you can lean over the manicured putting green at the edge of the precipice and see exactly nothing." (John 17.4)