First:
When I do a search for "expositor's bible commentary" I get no returns on my search.
If I search for "expositor bible commentary" I get the "Expositor's Bible Commentary" series.
Second:
When I am in a Bible and I go to the next page, and then back again, the page changes. For instance if I go to Philippians 4:1 in my ESV, on my Kindle Fire, I have the display starting in Phil. 10:1 going to Phil. 4:23. If I go forward 1 page, I will see the title page to Colossians. If I go back 1 page, I will now see the tail end of Phil. 4:1, and now "Colossians" at the bottom of the page, but none of the book's introduction. If I go back a page again, I see the tail of Phil 2:25 and the full verse of Chapter 1 verse 4. If I go forward a page, I see none of Phil 4:1, it starts with 4:2, and I see part of the introduction for Colossians.