Poorly written
The story of the Great Influenza is, itself, quite gripping -- a country coming out of the horrors of war confronts a plague on a scale not seen in the U.S. before. However, the author's writing leaves a lot to be desired -- as another reviewer notes, there is lots of repetition, but there are also plenty of instances of just plain bad writing (I seem to recall a sentence that was something along the lines of "Whatever their death was, it killed them."). If you are really interested in the story, it's worth wading through, but if you are the sort of reader who is put off by poor sentence structure and choppy narrative, you'll want to find a different book to read.