Books that give insight into High-Level corporate jobs

I'm looking for books that give insight into what it's like to work at a high-level corporate job. I've worked some low level white collar jobs, but I've always wondered what it's like in the in upper management or the C-Suites. I have read some books about corporate disasters (Enron in particular), but I don't know what normal executive work looks like.

I want to get past the stereotypes of what it's like, and I'm not interested in books that make it seem glamorous (i.e., no Wolf of Wall Street).