Bloom Library 
SIL International’s innovative Bloom software eases the process of bookmaking so that more people can participate – if you can type on a computer, you can create a book in Bloom.

Bloom users can create an original text or select a template, called a “shell book,” and insert culturally appropriate pictures and local translations of text. The books created can then be saved as a PDF and distributed in printed or electronic form.  It is also possible to use Bloom to create EPUBs and “talking books.”

SIL has been developing and using Bloom since 2011. For the All Children Reading Enabling Writers competition, SIL added features to let Bloom users create decodable texts and leveled readers. Literacy specialists can create “Reader Templates” that help writers create texts for specific languages that are decodable at various stages of learning and conform to leveling guidelines.
https://bloomlibrary.org/
SIL International
A nonprofit/NGO (other)
United States of America
Bloom Library 
dan_whitenack@sil.org
https://www.sil.org/
Yes - it has a direct download link or links
https://bloomlibrary.org/
Yes
All of your book's content must be either in the public domain, your own content, or content that you have permission to republish. Your book's Credits or Title Page must give credit to images used and describe the terms under which they are being used in the book (e.g. Creative Commons license). The presence of an image on the Internet (a blog, news reports, a clipart site, etc.) does not give you the right to republish it here, even if you give credit. Nor does a site saying "Royalty Free". 
open license
cc-by-sa-4.0: Creative Commons Attribution Share Alike 4.0 International