Lust Noir, Book #4 of The Noir Series, is a deeper look into the struggles of Sexual Addiction. A deeply-revealing account of the ongoing battle within himself, Kurt gives a brutally honest account of what it was like to fight the addiction as well as what it is like now, knowing the addiction continues to linger as he keeps it in-check and under control. Lust Noir also explores the impact that Sexual Addiction can have on a person's loved ones and peers; in Kurt's case, his wife, his friends, and his family. Additionally, the impact of Kurt's addiction is also expressed by the former student with whom he had the relationship (in this case, in her own words, from a letter she sent Kurt, years after his release from prison).