What has the author Charles Clarke written?

It's impossible to definitively say what Charles Clarke has written without more information. There are many people with that name, so we need context to determine who you're referring to.

To help me figure out which Charles Clarke you mean, please tell me:

* Is he a fiction or non-fiction writer?

* What is his general area of expertise (if known)?

* Are there any specific books or titles you remember?

Once I have more information, I can try to find out what he has written.