I'd really like to extend it. My recent realisation of the interconnections between information monopoly, censorship, prooagandaa, surveillance, and information has prompted further and related research. The interconnections are providing some interesting findings.

Tim Wu and Bruce Scneier, both in 2013.

A series of monographs on early copyright and censorship, notably Cyndia Susan Clegg:

Press Censorship in Elizabethan England https://www.cambridge.org/core/books/press-censorship-in-eli...

Press censorship in Jacobean England https://www.worldcat.org/title/press-censorship-in-jacobean-...

Press censorship in Caroline England https://www.worldcat.org/title/press-censorship-in-caroline-...