D printer,
Sorry, but as of now there are no books on OneCNC software.
I found it to be pretty straight forward.
If you have an specific questions you could post them up and we will see if we can help to you get acquainted with the software.
Also there are lots of good post here, to look through that may help you out. And there is the OneCNC web site as mentioned above. Also find the link above.
Them you could get real good and write a book, and make lots of $$$$....
