To design for the Baker Framework you just have to build HTML5 pages prepared for the iPad and iPhone screen and you can unleash the power of WebKit.
That’s all. Use your favorite tools, test it on the iPad from Safari, refine as much as you want, include all the HTML5 goodness: video, audio, animations.
Portrait? Landscape? iPad & iPhone? Web too? No problem with CSS 3.0.
Baker uses the open and simple HPub 1.0 format: one zipped file, contains all your HTML pages and all your assets, like a microsite.
Inside, one short file, book.json specifies page order, title, url identifier and properties of your publication.
Design your own navigation using an additional HTML file: index.html.
by following this tutorial
HTML5 publication example
Xcode 5.0 project, BSD licensed