Fixed Layout eBooks are a popular format for certain kinds of eBooks today. Instead of the flowing layout used for most eBooks, Fixed Layout “fixes” images and text to exact spots on each page as their print book counterparts and can sometimes contain enhancements that make them more interesting and interactive. This prevents images and text from shifting around and creates beautiful two-page spreads.
These eBooks are not PDFs. They are fully-functional HTML-based eBook files in every way, however, the specific styles and layouts used in these files are not re-flowable like standard eBook files.
At this time, fixed layout titles are only distributed to Apple iBooks.