Titles With Light and Dark

People of Darkness (Leaphorn & Chee, #4)
The Dark Elf Trilogy Collector's Edition (Forgotten Realms: Dark Elf Trilogy, #1-3; Legend of Drizzt, #1-3)
Dark Matter
Dark Lady's Chosen (Chronicles of the Necromancer, #4)
The Dark Side
The Left Hand of Darkness
Night School (Jack Reacher #21)
Darkenheight: The Watershed Trilogy 2
Farscape: Dark Side of the Sun
Until the Night (John Cardinal and Lise Delorme Mystery, #6)
Uncanny Avengers, Volume 1: The Red Shadow
This Dark Earth
Fear of the Dark (Fearless Jones, #3)
Alien: Out of the Shadows (Canonical Alien trilogy, #1)