Nathan Barry’s book Authority has been the single most useful ebook I’ve purchased. I’m using it to write my own self-published book Mastering HubSpot.
I’ve read the book twice and the second time around I took really detailed notes. I put them together on my blog in case anyone wants a taste of what the book is about.
I highlighted many of the main ideas, which can take you pretty far as a self-publisher, but the book itself has lots more detail and some excellent case studies.
I hope this is helpful!