David Kudler 
Inside the Box [EPUB ebook] 
An Introduction to ePub, HTML & CSS for the Independent Author/Publisher (Self-Publishing & Ebook Creation)

An ebook is just a website in a box
But what’s inside the box?
In this clear, concise guide, ebook designer and indie author David Kudler folds back the lid of e Pub, the universal ebook format. He introduces you to the nuts and bolts that make an ebook work.
Includes overviews of the e Pub format and internal structure as well as basic guides to the HTML and CSS (Cascading Style Sheets) that you need to know to make your ebooks look professional.
(Self-Publishing & Ebook Creation)
David Kudler is an independent publisher and author. He has been designing ebooks since 2010. He blogs about ebook creation, publishing, and marketing on Huffington Post, Stillpoint Digital Press, and The Book Designer.