Odd Factoid for Isaiah

Although both parts were written by Isaiah, there seem to be two distinct sections to the book. The second section starts with chapter 40. That means that the first part has 39 chapters, just like the Old Testament has 39 books. And the second part of Isaiah has 27 chapters, just like the New Testament has 27 books. Now, as long as we ignore the apocrypha, I think that coincidence is pretty cool!