As a Logotherapist and a Christian Minister it comes as no surprise to me that Logotherapy is compatible with, but not exclusive to, the practical expression of a Christian worldview.
The best book on the subject, in my opinion, is ‘Logotherapy and the Logos of God in Christic Wisdom’ by Jeremiah Murasso, a Priest and Therapist. Murasso briefly elucidates the key similarities between Jesus’ ministry of healing, and the principles of the Third Viennese School of Psychotherapy, that is Viktor Frankl’s Logotherapy and Existential Analysis.
These words from Murasso strike me as being particularly meaningful (note: he uses masculine references as gender-generic):
Although man has often become distracted and at times despondent in his search for ultimate meaning, he has never abandoned this quest. The reason for man’s persistence lies in the resiliency of man’s spirit, which although buried and at times bruised by the world, yearns for wholeness and completeness. The Christic Wisdom of the New Testament describes Christ nourishing the bruised yet yearning human spirit as he seeks to rekindle man’s awareness of his noetic core.