Harry Lewis has a terrific post about a $300 do-it-yourself book scanner he saw at the D is for Digitize conference on the Google Book settlement. The plans are available at DIYBookScanner.org, from Daniel Reetz, the inventor.

There are lots of personal uses for home-digitized books, so — I am definitely not a lawyer — I assume it’s legal to scan in your own books. But doesn’t that just seem silly if your friend or classmate has gone to the trouble of scanning in a book that you already own? Shouldn’t there be a site where we can note which books we’ve scanned in? Then, if we can prove that we’ve bought a book, why shouldn’t we be able to scarf up a copy another legitimate book owner has scanned in, instead of wasting all the time and pixels scanning in our own copy?

Isn’t Amazon among the places that: (a) knows for sure that we’ve bought a book, (b) has the facility to let users upload material such as scans, and (c) could let users get an as-is scan from a DIY-er if there is one available for the books they just bought?