This varied collection will instruct, though some of the content is now outdated, in a wide variety of areas that are sometimes of interest, and sometimes not- depending on the tastes of the reader. Personally, I found myself trapped into learning FAR more than I ever wanted into learning about the make-up of railroad rails. You have been warned!
Likewise, there are discouraging accounts of mankind's inhumanity to man in various venues.
It's an eclectic mix, most assuredly.