The Feynman Lectures on Physics

Richard Feynman.
Legendary textbooks taken from Feynman's lectures at Caltech. I borrowed Volume 1 from Sheffield Hallam University's library when I found it after starting my Primary Education degree there in 2010 and read a few pages, but it got a bit complicated when I tried to find audio and video recordings of the lectures and there are several versions. In December 2011 I could no longer renew it any further, so I took it back to the library to reset the renew count. Maybe I'll read it this year!