This is the fourth page of my book.
Note that every time you modify the book,
you will need to update the timestamp in the
“bookid” field at the top of the metadata.opf
and the “dtb:uid” field at the top of the toc.ncx
file. Otherwise, the iBooks app on your iOS
device will become very confused and display your
book in a screwy, mixed-up manner. FYI.