As I mentioned earlier, which format do you want to produce your
publications in?Maybe you shoukd consider Reflowable text ePubs or Fixed
Layout ePubs, which can have a certain amount of interactivity
(especially FXL), and can be produced with InDesign CC2015/2017 and be
viewed on an IPad and most other platforms.
I understand DPS is in Beta for InDesign CC2015, you can still use
CC2014.There are more things than DPS for interactivity for example Edge
Animate or as in this book: