LessWrong is getting ready to release an actual book that covers most of the material found in the Sequences.
To be more specific...
MIRI is preparing to release, in Q1 2015, an ebook version of The Sequences that has been pretty thoroughly proofread, rearranged to be a bit more concise and a lot more accessible to new readers, filled with short introductions to each newly defined 'sequence', and nicely typeset.
A hardcopy version (in multiple volumes) will follow, after readers have had some time to find the errors that we have missed. (An ebook file can easily be reissued with mistakes fixed; not so with hardcopy.)
This audiobook version produced by Castify (if the Kickstarter campaign succeeds) will be the official audiobook companion to the ebook and hardcopy versions. We've been in conversation with Rick about this for months, now.
Also, the book won't actually be titled The Sequences.
Is this book a compilation of blogposts or a new text based on the material of the sequence I know and love?
LessWrong is getting ready to release an actual book that covers most of the material found in the Sequences.
There have been a few posts about it in the past, here are two: the title debate, content optimization.
We've been asked if we'd like to produce the audiobook version and the answer is yes. This is a large undertaking. The finished product will probably be over 35 hours of audio.
To help mitigate our risk we've decided to Kickstarter the audiobook. This basically allows us to pre-sell it so we're not stuck with a large production cost and no revenue.
The kickstarter campaign is here: https://www.kickstarter.com/projects/1267969302/lesswrong-the-sequences-audiobook
If you haven't heard of us before we've already produced some sequences into audiobooks. You can see them and listen to samples which are indicative of the audio quality here.