Shoo Rayner is a professional who does children’s books.
This is his website (warning: autoplay music; click Stop button when there!)
He found out about iBooks Author by accident and has done two videos about it.
This first one I had to do myself. I ripped his longer video and trimmed it down to the demo of the finished book. I had to. There were six minutes of non-book material preceding it and WordPress now ignores the code to jump to the relevant bit in the video.
There was something odd about that book. Did you notice it?
The cover is color. The interior illustrations are uncolored. That’s still thinking in print. Color pixels are free!
This next video is what led up to the book. Dig it: He gets so excited and so engrossed in it that day turns to night:
And this is an interesting video about iBooks Author ibooks versus Kindle Format 8 (KF8) file creation — and about how antiquated the print publishing-based industry still is when dealing with getting an ISBN:
This is all the realization of what I said back in 2009: Apple Will Break Open The Digital Book Floodgates
You will not need a developer to create a digital book.
Notice had he immediately jumped in to do this book with iBooks Author. Notice how there is no ePub version of that book, despite him having a Mac and Pages. It was only iBooks Author that let him jump in and do it.
This year is going to be very interesting for digital books and xBooks.