http://www.molly-greene.com/ebook-pricing/
Fixed layout children's ebooks
http://ebookarchitects.com/learn-about-ebooks/childrens-ebooks/
Free open source fonts that you can embed in ebooks
http://ebookarchitects.com/see-how-we-work/embedded-fonts/
Book Industry Study Group
http://www.bisg.org/
publishes field guide to fixed layout ebooks
http://www.bisg.org/docs/FieldGuidetoFXL_v1.1_Final%20for%20Publication.pdf
