The books from the publisher Sidestone Press can be read on its website for free immediately upon publication. Furthermore according to their Open Access model, the publisher makes their books available for free download 4 years after publication.
Their catalogue contains ca. 450 titles and 40-60 new books are published each year.

Based on a request from a reference librarian, I ask you to get in contact with Sidestone press and check whether these freely and Open Access titles can be added as a collection in the CZ.

https://www.sidestone.com/contact/
https://www.sidestone.com/publishing/open-access-policy