This book is just all right. I used it to get info about HBO for the Wire chapter and conclusion of my thesis (and because it contains one of the, I think, two scholarly essays on The Wire) of my thesis). It provides a pretty good history and some analysis (the intro to the "Comedy" section by Amanda Lotz and Bambi Haggins is the best), but the chapters - which are each on one show - are so boring and uncritical. They read more like blog posts or reviews than actual scholarship. I wouldn't call it "essential" unless you are writing about HBO.