If Isikoff was such a disreputable sleazemonger, why would Toobin want to write a book with him?
Toobin was unwilling to write a book about Isikoff because of his bad reputation.
mnli hypothesis: Toobin was unwilling to write a book about Isikoff because of his bad reputation. premise: If Isikoff was such a disreputable sleazemonger, why would Toobin want to write a book with him?