I have just posted FLP Volume II at The Feynman Lectures Website and at it's speedy Caltech mirror. This more or less completes the online edition of the book, though there are still some improvements to be made that I will be working on as time allows. For example: in Volume II you will notice under the title of many chapters (linked) recommendations for review of chapters or sections in Volumes I or II, references to other books and papers, and helpful reminders such as, "In this chapter c=1." Though this kind of supplementary information was never present in Volume I, it is present in (the printed and PDF editions of) Volume III but is currently missing from the HTML edition, and I intend to add it. I also plan to improve the tables, and the typography of the text and mathematics in Volume I, and to improve figure and table placements throughout all volumes.There ya go!
In addition to posting Volume II, I have made some systemic style changes. Previously the pages had margins 70 pixels wide on each side. I have reduced that to 10 pixels (max) on the left, and 65 on the right to make room for the floating menu, which is slightly narrower and now also includes a "style changer," implemented mostly for the sake of iOS users who wrote to inform us that our text was un-readable on their devices: too small. The default font sizes are the same as before (12 pt body text), but now you have a choice: you can scale the size of all fonts up by 125% or 150%, and when you do so the left margin becomes narrower and the text is no-longer justified, which saves screen space. You're style preference is remembered between pages and between sessions, so you should only have to choose once on each device you use to read FLP. (There was another problem too on tablets: our pages were sometimes not opening zoomed to fit the device width: now they should.)
I would also like to inform you that Dr. Rudi Pfeiffer and I have (finally!) completed the manuscript for our edition of "Exercises for The Feynman Lectures on Physics," which was started in 2008. It's 306 8.5"x11" pages include approximately 1000 exercises covering the main sequence material in all three volumes of FLP, with 28 pages of answers/solutions in the back. According to our Executive Editor at Basic Books, the exercise book will be available in paperback online and in stores in the summer of 2014. We will also offer a PDF edition in our "Desktop" format (the same as the printed book, but with margins all on the right). My next project will be to produce a "Tablet" edition of the new exercise book to go with our recently released Tablet Edition of FLP.
In closing, I would like to thank all those people who have written to us. You're appreciation and interest in FLP is very rewarding and encouraging. I wish to particularly thank those who informed us of _problems_ with our web interface, or errors in the text or equations of the online edition of FLP; you're input helps make FLP more accessible, and more comprehensible. So, please keep those emails coming!
Editor, The Feynman Lectures on Physics New Millennium Edition