I was able to build this lamp for under $20 (US) The books cost $6, The Switch and fixture cost $7.50, and a few misc. items that was another $4.
Another successful book lamp from a dedicated user! That particular light bulb looks brilliant, a great addition to the build. If you missed the first one, here's what user Richard C made last week. Well done guys, let's keep them coming!
Altoid tin alterations are pretty popular among the hacking community, but this one takes it down in size. Using the Altoids Slim tins, Instructables user Joshua Zimmerman put together these bite-sized LED flashlights for under $5. With just a tiny bit of drilling and soldering, you could easily assemble a handful of these in an hour or two.