This is my first time Using InDesign. I have imported 19 jpeg files into ID. Each of the jpegs is 1200x600 pixels, at 300 dpi. They are RGB. Each jpeg is meant to represent a page in a fixed layout children's book, which I will want to upload to Barnes and Noble. When I export the files (in ID) to create an EPUB book, the resultant pages in the book are tiny- about the size of thumbnail images. I have previewed the EPUB file in both Adobe Digital Editions, and in Kindle Comic Creator- same results both places- a tiny, tiny book. Any idea as to what I am doing wrong here?