RE: Copyleft
The idea of copyleft is that you give anyone the freedom to do anything with your work, with one essential restriction: they do the same for their changes, derivative works etc. Technically attribution doesn’t have to be part of a copyleft licence, but all copyleft licences I know have a requirement to preserve copyright info.
And yes, it is popular in software (GPL, MPL, EPL), but for other types of works there is CC BY-SA 4.0 (Creative Commons Attribution-ShareAlike). If you want to copyleft books, images, videos, other forms of text… this is the way to go, IMO.
Some additional remarks, just to clarify:
The Wizard Book is a classic that basically “builds” programming as a concept.
(it is very technical though. So not sure it’s something you’re looking for)
Following Far Cry’s release, Crytek, wanting to show that CryEngine had other applications, signed a deal in July 2004 to develop a gaming franchise with publisher Electronic Arts (EA), a direct competitor to Ubisoft. This franchise became the Crysis series, and through which Crytek continued to improve their CryEngine.
Weird/confusing name, questionable legality and the website went down a while back (while mentioned explicitly in the licence…)
Use CC0 1.0 or Zero Clause BSD instead. They are more reputable, and all decent “public domain equivalent” licences are… well, equivalent in effect, anyway.