They may read it in order, but they don't study it. For about twenty years after we left the Watchtower my wife and I went to a mainstream Christain church. Every week there was a about a half hour sermon that was entirely based on a book of the Bible. It would take weeks to go through even a short book.
There is a reason JW's don't do that. The Watchtower's method of interpretation is to bounce around the Bible pulling verses out of context and without regard to what sort of book (history, poetry, prophecy) it is, who the author was, or the intended audience. The Germans have an expression "Kreuz und Quer" "Cross and cross" or perhaps "back and forth." I first heard that when I was doing my exit research. It perfectly captures the way the Witnesses look at the Bible.