Fixed-layout epubs, apps and more!

There's a lot of info here, on complicated epubs like Children's books:

http://ebookarchitects.com/conversions/childrens.php#fixed

"In December 2010, Apple introduced a new format for ePub files in their iBooks app: “fixed-layout” ePubs. Unlike the standard eBook files described and shown above, these eBooks can keep the same layout and designs as their print book counterparts. These eBooks are not PDFs. They are fully-functional ePub files in every way, however, the specific styles and layouts used in these files will only work in iBooks."

There's also a tiny section on Standalone eBook Apps and about outsourcing them.