Lords of the Underworld (2008–2014)
- The Darkest Kiss (2008)
- The Darkest Night (2008)
- The Darkest Pleasure (2008)
- Heart of Darkness (2009)
- The Darkest Whisper (2009)
- Lords of the Underworld Collection (2011)
- The Darkest Surrender (2011)
- The Darkest Seduction (2012)
- After Dark (2013)
- The Darkest Craving (2013)
- The Darkest Touch (2014)