This is a very interesting thread. I recently purchased the ISB NT and the ISB The Book of Joshua. With regard to the paper thickness(individual paper thickness), both books are about the same. As you can see in the picture, the Book of Joshua is slightly bigger than the ISB NT, but the paper In both feel very similar. Only the NT version has cross references. With that in mind, See the screen shot that shows the thickness of both study guides. There’s no way they can put both the OT and NT in one volume while keeping the paper quality and thickness. I question if a one volume OT is possible with the current paper thickness. I for one would like to see it divided into three volumes to keep the paper quality but we will see. To be honest, when I ordered both couple of weeks ago, I ordered under the assumption that the OT version may never come out. I hadn’t heard anything in years so I ordered both. A few days later, this thread pops up. No worries, I’m glad I didn’t wait. I wish I didn’t wait all this time to begin with. The ISB is awesome.(Please Note: This uploaded content is no longer available.) (Please Note: This uploaded content is no longer available.) (Please Note: This uploaded content is no longer available.) (Please Note: This uploaded content is no longer available.) (Please Note: This uploaded content is no longer available.) (Please Note: This uploaded content is no longer available.)