The Bookworm

Above is depicted the "Encyclopedia Puzzlania", the largest collection of Puzzles ever assembled. Five large volumes, each is 400 pages long packed with great puzzles, riddles, and paradoxes. This particular edition has a slight problem. What you can't see in the illustration above is that a tiny bookworm has been having a feast. Starting at the first page of the first volume, he was finally sated just upon reaching the last page of the fifth volume.

Assuming that the bookworm made a straight and horizontal line from left to right, that each leaf is .01 inches thick, and that each cover is .25 inches thick, how long (in inches) was this bookworm's bibliobuffet?