Reddit reviews Appropriation (Whitechapel: Documents of Contemporary Art)

I recommend finding/purchasing a copy of the book ‘Appropriation’. It is part of a set of books produced by the Whitechapel gallery in London, they are excellent anthologies of sources by artists and writers around key subjects. The excerpts are often short but those of interest to you can lead to further reading.

I believe you’d also find ‘Postproduction’ by Nicolas Bourriaud compelling.

Good luck with your research.