With Marvel's Daredevil beginning in less than a week, it's a good time to brush up on the character that most people are excited to see in Daredevil's life: his one-time lover, the assassin Elektra.
Daredevil #173-182 (Frank Miller and Klaus Janson) - This includes the height of Daredevil's relationship with Elektra, as well as that famous battle between Elektra and Bullseye. You can get this in "Daredevil Visionaries: Frank Miller (Volume 2)."
Elektra: Assassin (Frank Miller and Bill Sienkiewicz) - The insanely beautiful (and just plain insane) story that sees Elektra as a force of nature, clever and invincible. It also delves into some messed-up things from her childhood. One of the best superhero stories period.
Elektra: Everything Old is New Again (Greg Rucka and Joe Bennett) - The best portrayal of Elektra since Frank Miller's original run on the character, this storyline sees Elektra grapple with a conflict of conscience.
Daredevil #190-191 (Frank Miller and Klaus Janson) - The "resurrection" of Elektra, by The Hand. This is collected in "Daredevil Visionaries: Frank Miller (Volume 3)."
Elektra Lives Again (Frank Miller and Lynn Varley) - Matt Murdoch sees a ghost - Elektra. But is it really her? Another beautifully rendered story that sees the two former lovers come face to face.
Dark Reign: Elektra (Zeb Wells and Clay Mann) - Following the events of Secret Invasion, in which Elektra was replaced by a skrull (she was, in fact, the first character to be revealed as having been replaced by a shape-shifting alien during this crossover event), Elektra is kidnapped at her weakest, but takes it upon herself to be her own savior during this difficult time.