I have a couple of books by McFarland and they are reference books for the most part. For example one of the books I have is a checklist of movie theaters in Detroit, the names and addresses from the silent days to date of publication. Another is a history of PRC/Eagle-Lion/Screen Guild and Lippert Pictures with titles in chronological order. I guess you could say those books would have limited appeal, but they were published.
The quality of the book depends on the author, though. One book they put out about network daytime schedules was filled with errors (They had Yahtzee listed as a CBS show, among other things.)
The Hal Erickson book Curt linked to is a good reference book if you want to find out which syndicator distributed what show, but an infuriating read if you are a game show fan. Erickson doesn't have a kind word about game shows (though McFarland uses a picture of one on the cover). For example, he refers to the second host of BTB86 as "the gloriously named Joe Farago," inferring that the show was a farrago.