A possibly usefull tip for those contemplating mass scanning: Scanners are available where the book holder has the shape of a V where you can place the book, half open, and the scanner will turn each page and scan each page with a scanning head that hovers above it and decends each time for scanning first left, then right page.
No idea how expensive they are but there are many services that use them to scan your books for you and they are relatively cheap, like $ 15 for a 300 page book. Advantage: the book survives intact, and presumably it's fast as well.
When I run that search (which is pretty much the same as the search I gave the URL for earlier), then look at the books that have "TTL" in their titles, none of these titles are TTL related; they're all linear and interface books.
Which makes me wonder where the correct TTL data book in the list of PDFs came from.