I know Crohn's and Colitis patients are probably tired of seeing the same old diet books. What kind of ebooks would you actually buy if you saw one on amazon or on a website? What would the ebook be about?
I'd suggest getting a book written by a gastroenterologist as a starting place.
I got one by Professor John Hunter. He's a GI specialist in the UK. I found the book easy to understand and it covered a lot of topics.