cn. pompeius magnus (pompey)

Cn. Pompeius Magnus (better known to the English speaking world as Pompey), the unofficial "first triumvir" and later adversary of C. Julius Caesar, is one of the more intriguing, exasperating, and tragic figures of the late republic.

Our current read, Fortune's Favorites by Colleen McCullough, opens with a young and cocky Pompey  eagerly offering his troops to Sulla to march against Rome and follows his career through March 69 BCE, when he becomes consul for the first time, side-stepping the cursus honorum in typical Pompey fashion.

Smith's Dictionary of Greek and Roman Biography and Mythology has a lenghty discourse on him, beginning here.  N.S. Gill has a number of links at Pompey - Cn. Pompeius Magnus, such as Pompey's Wives.

In print there is Pompey the Great: A Political Biography by Robin Seager.