We've had a dark night ourselves.
"Harville Hendrix, Ph.D.", (born 1935) is an author of relationship self-help books and with his wife Helen LaKelly Hunt is the creator of Imago Relationship Therapy.
Hendrix is best known for his book Getting the Love You Want, a New York Times best-seller, which gained popularity after Hendrix appeared on The Oprah Winfrey Show. He has a Ph.D. from the University of Chicago. With his wife, he founded the nonprofit organization Imago Relationships International, which trains therapists in Imago Therapy. Their son, Hunter Hunt-Hendrix, is the front man of the American black metal band Liturgy (band)/Liturgy.More Harville Hendrix on Wikipedia.