This quote is from Chapter 3 of the book "The Boy in the Striped Pajamas" by John Boyne. In this chapter, the protagonist Bruno, a young German boy, is beginning to understand the atrocities committed by the Nazi regime and the impact it has on those around him, including his family.
The quote refers to Bruno's father, who is a Commandant in the Nazi army and is involved in the administration of a concentration camp. The mention of "the incomprehensible" and "detestable" suggests that Bruno's father is aware of the horrific nature of his work, but is powerless to escape it. The "fascination of the abomination" refers to the evil that is so alluring that one is drawn to it, despite being repulsed by it. This could suggest that despite the disgust and hatred felt by Bruno's father, he is unable to resist the power and influence of the Nazi regime.
Overall, the quote highlights the complexity and dilemma faced by those who are involved in the administration of concentration camps, and the impact it has on their lives.