Updating the book & license

I'm updating the book, even though not much has changed since the last update. In fact, the only thing that has been changed is clarification of side-effects on pieces. Reason why I'm updating the book is because of licensing.

I always thought that simply stating "this book is published as public domain work" should be enough, anywhere in the world. Recently, I stumbled upon Creative Commons site, and I quote: "Dedicating works to the public domain is difficult if not impossible ...", and "... many legal systems effectively prohibit any attempt by these owners to surrender rights automatically conferred by law, particularly moral rights ...".

Now, I'm not sure what are any additional rights automatically conferred by law, beyond moral rights mentioned on Wikipedia site:

• the right of attribution
• the right to have a work published anonymously or pseudonymously
• the right to the integrity of the work

I assume that situation is complicated, since every country has its own  copyright law, each unique in its own way; I'm not even sure how this is treated in a country I live in.

However, to me moral rights as listed above seems completely fine, they should not impinge on any major right granted by Creative Commons Zero 1.0 Universal Public Domain Dedication (henceforth CC0) at all, namely:

• free access, and freedom to use the work as user wishes ("use" includes to run a program or to execute a music score)
• freedom to access the "source" and use it as user wishes, for study or change it for personal use
• freedom to redistribute copies
• right to quote (freedom to redistribute copies of fragments)
• freedom to distribute copies of user's modified versions to others 

From what I understand, if I have moral rights retained, only the last item would be affected somewhat; modified versions should be distributed under a new title, and with new authors, due to the right to the integrity of the work. I'm not sure if right to attribution applies to modified versions; for instance, if modified book should contain "this book is based on ..." clause somewhere in a colophon. It would be nice if it does, but it's not that important to me.

If that's all there is to it, then I'd like to retain moral rights, even if I have had put the book into the Public Domain. If there are some other rights that would prohibit any of freedoms listed above to any person, then CC0 should come into play, and waive those rights away; this is what I meant with "where Public Domain is not applicable".

The reason I put my book into Public Domain in the first place is to prevent any publisher from closing access to my book behind a pay-wall, and limiting its usage by the public, especially given that some publishers are getting very creative, when it comes to their own benefits. And the reason why I choose to go with CC0 is because it seems that simply stating "this book is in public domain" isn't exactly enough.

To summarize, the book itself (PDF file), source texts (TEX files), generated images (PNG files), photo (NEF, and JPG files) are all in  Public Domain, under CC0. Note that all scripts (SH, and PY files, including those used to generate images for the book) are published under GNU GPL v3+ license, as are the rest of source code (C, and H files). Licenses, and how to apply them are found in COPYING, and LICENSING files; in book folder for the book, and in the root folder of the project for source code, and scripts.

Edit: it's actually way worse than I thought. So, I decided to apply CC0 unconditionally, and to hell with moral rights; they are not worth risking any legal loophole which I might have unintentionally introduced, along with possibility to creatively interpret intended usage, and applied license. The book is already updated, and uploaded, both onto GitHub repository, and Google Drive.

Edit 2: CC0 is a dedication, not a license.