A Google user
The first book I ever read about the Napoleonic Wars was John Keegan's "The Face of Battle" when I was in high school. I will always have the deepest respect for Keegan, but he described this book as being a very valuable source but also "unreadable". On the contrary, I've found Siborne to be quite readable, if a bit of a slog in parts.
And his research was superb. Peter Hofschröer's book, "Wellington's Smallest Victory" is largely based on Siborne, and he shows that what we in the English-speaking parts of the world think we know about Waterloo is a long way from the truth, due to the Duke's influence and ego.