Genre fiction with Polyamorous Relationships, that I have read and think others would enjoy. For most of these the romance will be part of but not the point of the story.
#1 of 1 in A Dowry of Blood
#1 of 1 in Tangled Axon
#2 of 2 in Reaper
#1 of 1 in The Summoner's Circle
#2 of 2 in Night Shine
#1 of 2 in Reaper
#2 of 3 in The Necromancer Chronicles
#1 of 4 in Wayfarers