bookworm eats from the first page of an encyclopedia...

Puzzle Question: 

A bookworm eats from the first page of an encyclopedia to the last page. The bookworm eats in a straight line. The encyclopedia consists of ten 1000-page volumes and is sitting on a bookshelf in the usual order. Not counting covers, title pages, etc., how many pages does the bookworm eat through?

Level of Toughness: 
Intermediate

On a book shelf the first

On a book shelf the first page of the first volume is on the "inside"


_ _
B| | | |F
A|1 |...........................|10|R
C| | | |O
K| | | |N
| | | |T
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so the bookworm eats only through the cover of the first volume, then 8 times 1000 pages of Volumes 2 - 9, then through the cover to the 1st page of Vol 10. He eats 8,000 pages. If the bookworm ate the first page and the last page, it ate 8,004 pages.