what is a millimitric radar

I want to know about millimitric radars.Please specify some websites or ebook regarding this topic.

I think the book: Principles and Applications of Millimeter Wave Radar
(editor N. Currie, Artech House)
a comprehensive description on millimeter wave radar.
The book describes the theory, components, subsystems and applications.

regards

Hi every body:
I need this book :Principles and Applications of Millimeter Wave radar
can any one help me please