The ebook is free to read!
Onsite: https://geminicblue.com/projects/20-galaxies-book-1/20-galaxies-part-1-legend-in-the-sky/
PDF: https://20galaxies.files.wordpress.com/2019/06/20galaxiespart1pdf.pdf
EPub: http://www.mediafire.com/file/20e176ocgh77iqh/20galaxiespart1epub.epub/file
If you would like a different format, please let me know and I will try to get it for you.
The print edition is $12 and currently can be ordered from a number of sites! Barnes and Noble: https://www.barnesandnoble.com/w/20-galaxies-c-l-caldwell/1131668668?ean=9780578514901
Bookshop.org: https://bookshop.org/books/20-galaxies-part-1-legend-in-the-sky/9780578514901
IndieBound: https://www.indiebound.org/book/9780578514901