She essentially has five hours of tv commercial time for her book (much like O’Reilly and Hannity, who has an additional fifteen hours of week of radio commercial time). I beleive those guys have far more consistently successful books.
O’R has his “killing” series, which is a nice niche, I suppose, and I suspect his co-writer actually writes the the things. Hannity has his annual politics book, and he can count on his radio audience to reliably buy a lot of books.
Kelly’s book is a bit of a hard sell. It’s about her, primarily. I don’t think the average person finds her that interesting and she isn’t really a notable person.
Also, I tend to think of Kelly’s audience as “Fox News viewers” and not so much “Megyn Kelly viewers.” I think that O’R and Hannity would bring viewers to another station if they moved (I doubt they ever would), but I don’t think Kelly has a comparable, genuine following.
Hannity doesn’t want to write any more books. Nor
Does he have to.