A good reference for the wave front set
I am wondering whether anyone know some good references for the theory of wave front set, microlocal analysis? I have some basic knowledge of distribution theory at the level of the Rudin's functional analysis (the first part). As for PDE theory, I learned this topic mainly by Folland's "Introduction to Partial Differential Equations".
When I learned the distribution theory, the book by Strichartz gave me many intuition and helped me a lot. I am wondering whether there is a similar book to introduce the theory of wave front set, microlocal analysis?
Thank you very much!