publications - How do I convert my PhD dissertation so that it can be published as a book?

I have just completed a PhD by research, which I think has some merits in being available as a book (This is, of course, my personal opinion). The research cuts across several fields (e.g. sociology, public policy).

I am wondering what I need to do to take the next step.

In particular:

1. 
   
   

   How do you turn an academic piece like the dissertation (which is written for the examiners) into a book (which is for the general public)?

   
   


2. 
   

   How do I find publishers who specialise in my field?