"What we know of Jefferson's superbly fertile mind, as Saul K. Padover points out in his Preface, is derived mainly from his letters ... From these letters, and other sources - both pulished and unpublished - Padover has extracted the essence of Jefferson's views on democracy."
Books like this are very important if one wants to understand the subject without making it a major endeavor. It is best not to read it as a book, but to separate it into small chunks; the format of this volume makes it easy. I used it as a bathroom book, and polished it off as a walking the dog book. (The family Shih-Tzu spends far more time sniffing than walking, so it works out to have a book for this, since I have the time.)
Jefferson's thoughts I sometimes find unrealistic or wrong. Nonetheless, this is a lot more right than wrong. This volume is quite valuable.
I note the copyright for Padover's stuff is 1939; 1946 is likely the date of the edition my review is typed under.