Entire Safari Library of 8,000 Technical Books on line !for free! for California Residents - free scanner too
That's 8,000!!!! technical books. They have the entire O'Reilly library. Anyone living in California can get a library card. (Since The Best of Instructables is an O'Reilly book it's also in the Safari Library, but you know you want your own copy!)
If you don't live in California, check your local library's website, and see what they offer online. SF also has many eBooks, and books on tape on line for free.
I also discovered they have a scanner by the Microfiche in the Main/Civic Center branch (I don't know about other branches), that will eMail microfiche/microfilm pages to you for free. It has a regular scanner also, so you can scan a book, or magazine page, and email it to yourself - for free - no need to pay for copies. The scanner has a USB slot, so you can just save the scans to a USB stick instead of emailing them. It's on the same floor as the Magazines.
I don't know what other libraries are doing but SF has a huge amount of stuff available online.