I'm particularly interested in works that explore empirical evidence for linguistic relativism and/or discuss implications on the limitations of cognition within a language.
This list includes both common recommendations and stuff I've actually read:
Deutscher, G. (2010). Through the language glass: Why the world looks different in other languages. Macmillan.
Gumperz, J. J., & Levinson, S. C. (1996). Rethinking Linguistic Relativity: Studies in the social and cultural foundations of language. Cambridge: CUP.
Lakoff, G. (2008). Women, fire, and dangerous things. University of Chicago press. (The chapter on Whorf and relativism)
McWhorter, J. H. (2014). The language hoax: Why the world looks the same in any language. USA: Oxford University Press.
Pinker, S. (2007). The stuff of thought: Language as a window into human nature. Penguin. (The chapter on '50,000 innate concepts')
Whorf, B. L., Carroll, J. B., Levinson, S. C., & Lee, P. (2012). Language, thought, and reality: Selected writings of Benjamin Lee Whorf. Cambridge, MA: MIT Press.
There is a linguist in Michigan named Susan Goldin-Meadow who wrote a fascinating article contained in this book:
Language in Mind: Advances in the Study of Language and Thought (MIT Press)
She makes a case against the Whorf hypothesis using modern laser technology to track eye movement. This then shows that ergative thought remains even after a speaker routinely uses a non-ergative language for a long period of time.