Pay What You Want for Guy Kawasaki's eBook on Gumroad

"How to circle people, how to perfect your profile, how to craft effective posts, how to comment, how to respond to comments, and how to share photographs." This warrants a book?

Is it hard to make an ePub format book along with a PDF file?

I really dislike the way PDF files display on my small Sony Ereader (especially with programming books where there is inset code paragraphs and zooming-in messes their layout completely). From my experience, EPub handles the wrapping much better.

The ui for the payment is the best I've seen so far !!