For the critique from the other end of the social constructionism spectrum, I strongly suggest you read the chapter devoted to him in Sokal and Bricmont's Impos

For the critique from the other end of the social constructionism spectrum, I strongly suggest you read the chapter devoted to him in Sokal and Bricmont's Impostures intellectuelles (I think it was translated as Fashionable nonsense). It's a little hard to find in print, even in libraries. But I'm sure one could source a digital copy from a less reputable source.