Curtis Otaguro solved last month’s puzzle. It will take the
bookworm only 1.5 hours to go from p1 of volume 1 to the last
page of volume 3. As you look at the 3 books on the shelf, you
realize that p1 of volume 1 is at the right side of the book and the
last page of volume 3 is actually on the left side of volume 3.