Time and the Last Knight — Richard T. Stevens

A tale of friendship and war, of love and hatred, of survival and loss. Transpiring across time and space, on two separate worlds, spanning over seven hundred years of history and incorporating other planes of existence. Quintin is lost and drifting throughout the ages with no memory of what or who he is. Hunted by sinister Minions of the Dark, Quintin seems painfully unaware that he alone is the last of an order of interstellar knights - guardians of galactic peace.