Behind Closed Doors by Jane Davitt. This is Giles and Spike in a dom/sub relationship, written from Spike's POV and covers six months, from the summer of Buffy's death in The Gift, to Christmas. It is AU in that Buffy is never brought back. The story moves around in time a little; it begins in early December, there's a lengthy flashback to June/July and then the story moves forward to Christmas. Spike/Giles NC-17.

Darkness by James Walkswithwind. PWP, BDSM, bondage, pain, rough sex. Angel/Spike, Spike/Suprise, NC-17.

Days of Our Unlives by Donna and others

I Never Learn by Rabbit

The Mercy Seat by Lovesbitca and Lyric - Spike/Willow, a bathroom, sex and despair. A great combination brought together in this wonderful, steamy heartrending story. Spoilers for Season 6 BtVS. Warnings, bloodplay, semi-non, drugs.

Modus Vivendi by Wiseacress. Dark and bleak, AU season 5 BtVS. Spike/Xander, NC-17.

My Childe,Absence Diminishes Little , and Taking the Dead by Saber ShadowKitten

Recalled Emotional Memories by Avarice

Season Noir by Anna S. Wonderful AU season with invading demons and Spike in uniform. A must read. Spike/Buffy, NC-17.

The Clockwork Vampire by Spirit