Hi, Paul. I have checked out the website and viewed the download. Have you considered downloading the Sony Reader Library? It usually gives a pretty good idea of what it will look like on the Reader.
I don't have any experience with formatting and hope that someone with more experience will jump in soon. Due to the holidays, a lot of members are busy elsewhere or have less time on MR.
On the Reader Library:
The Sony is Black and White so you lose the effect of the original photos on your site.
Page one of Reader photo doesn't fill page.
Page two of Reader (which is still page one in ePub numbering) only has the logo, Kids of Nature and the rest of the page is blank.
Page three of Reader (page two of ePub)
Page four of Reader (still page two of ePub) just the logo again as above.
I am sure you have considered the completed file size and if the various readers could handle the image heavy book. Also, having so much blank space and having to page turn often was not a great experience for me.
Have you looked into
the Sigil forum on MR? At least two of our members have created beautiful epubs with illustrations. pdurrant created an amazing ePub children's book,
Desbarollda, The Waltzing Mouse. I thought it was beautiful, but I think he felt his original ePub was better.
Also, MR member Zelda_pinwheel made
an illustrated ePub, Jerome, Jerome K.: Three Men in a Boat. You may want to check out how the illustrations look in those books.
Is this to be a book for children to use on eReaders?
Good Luck with your project.