When I export ePub from ibooks Author 2.4 using the ePub template I lose the viewing features in iBooks. I can not change the background color to sepia or night view and I can't change the fonts. The only option I have is zooming the text bigger.
OS X Yosemite
Version 10.10.5
iMac 27
iBooks Author 2.4
iBooks 1.2
iMac, Mac OS X (10.5.5)