Favorite Book - number three

Favorite book number three is The Reason Why, by Cecil Woodham Smith.  It tells the tale of how the charge of the light brigade happened.  Not the foolishness of charging  heavy artillery with light cavalry equipped with only swords and pistols, but more, how could you educate a class of people into behaving that way.  It explores the life of the privileged in 19th century England and goes into the background of the three principles involved - Lord's Raglan, Cardigan and Lucan.  The first two of whom were better known for their contribution to clothing than for their military tactics, which were dreadful.
I learned a great deal about the Irish Question and the way society functioned.  I think I've read the book three times at least.  There have been a couple of movies about the incident, one with Errol Flynn and the other much later with Trevor Howard, as Cardigan and Gielgud as Raglan.  A young David Hemmings plays Capt. Nolan who had an important role in the lead up to the charge.  This later film is worth watching, but the book will tell you so much more.