A new way to read the Sequences:
https://www.readthesequences.com
It's also more mobile-friendly than a PDF/mobi/epub.
(The content is from the book — Rationality: From AI to Zombies. Books I through IV are up already; Books V and VI aren't up yet, but soon will be.)
Edit: Book V is now up.
Edit 2: Book VI is now up.
Edit 3: A zipped archive of the site (for offline viewing) is now available for download.
I already have the PDFs(which I distribute wantonly). I am not sure whether it is more advisable to direct people to the site as opposed to giving them the PDFs. As it is, I usually download Lesswrong pages for offline reading, while I don't want to self-anchor I'm not sure the site is better than the PDF.
Also, FYI, once the remaining two books are up, the entire site will be made available as a zipped web archive, which you'll be able to download for offline viewing.