Again to Carthage is a novel by American author John L. Parker Jr. initially published April 1, 2008.

Star college miler, Quenton Cassidy has returned home from the Olympic games where he has taken the silver medal in the 1500 meter "metric mile" race.

Mr. Parker's unique writing skill is to immerse the attentive reader in the peculiar (by modern American standards) life of the serious distance runner while avoiding the mind-numbing attention to the daily grind of the athlete himself.

As Cassidy runs his race (the U.S. Olympic marathon trial) two strange, arguably metaphysical events leave the reader wondering what is real and what is being imagined.

Through this crucible of the will, the protagonist, Quenton Cassidy is transformed from a mere mortal yet again (as in Parker's prequel, "Once a Runner").