The problems with apps like Byook are they are trumpeted as the next evolution of story telling but always end up being content added to “enhance” the story by people who didn’t write the story in the first place.
Every jiggle, pan, and fade takes the reader out of the text. It doesn’t bring us closer to the story but seems to constantly get between us and the storyteller.
Enhancing the reading experience should be adding content and meaning not illustrating what the author already described. I am afraid that until more authors learn to code we will have to wait for a truly evolved digital book storytelling experience.