If you are doing NaNoWriMo and need inspiration or writing or publishing tips, Prolific Works has pulled together a list of 51 ebooks that you can download for free.
The books don’t all focus on writing and publishing; some cover marketing, and you can also find Mark Dawson’s resource guide in this list. Also, they are only free in that you trade your email address for a download rather than money.
I for one am glad they pulled together this bundle. Most years I see paid bundles of ebooks via Humble Bundle or another source, but I have never felt comfortable recommending one after the time I bought a bundle and found a lot of the books to be useless (there was a lot of pontificating about writing, but very little actual advice about writing).
These free ebooks are so much better because at worst they will cost you a few minutes and your email address.