Since books aren't published on the same economic model or platform as journals, they aren't affected by Open Access.
One thing you could do is self-publish a book with a Creative Commons license on it and simply not charge for digital copies. However, this has major downsides:
Because libraries acquire tens or hundreds of thousands of books a year, books aren't picked title by title. Instead, they submit information about the topics and academic levels in which they're collecting, and the publishers send them books that match that profile. Similar things happen in bookstores. This means that without a publisher, your book won't find a market as easily.
So only use this model for creative writing, fiction, and non-scholarly non-fiction when you think you will be able to find your own market online.
The better idea is to choose an appropriate scholarly publisher (a university press) and see if you can negotiate to either
You may not get anywhere with this, but it doesn't hurt to negotiate for what you want.
Even if you can't successfully negotiate an author agreement that allows you to retain self-archiving rights or put the work in the Creative Commons, there are some other rights that you need to negotiate for.