I am interested in disability studies and social construction of disability. Anything to get insight in state of important literature?

Good luck!

Thanks for your advice!

There's interesting, theoretically innovative work being done on disability by several medievalists, if you're interested in exploring disability in history as well. I found the following readings important for your work, most of them are open access.
World Health Organization and the World Bank (2011). World Report on Disability. WHO: Geneva.
Thomas, Carol (2004). How is disability understood? An examination of sociological approaches. Disability & Society, 19(6):569-583.
Shakespeare, Tom (2006). The Social Model of Disability. In Lennard J. Davis (ed.), The Disability Studies Reader (Second Edition), Pp 197-204. New York: Routledge.
Zola, Irving Kenneth (1989). Toward the Necessary Universalizing of a Disability Policy. Milbank Quarterly, 67(2):401-428.