This was Sears' first Civil War book, from back in the early 1980s, but he's already got his in-depth style largely set. As usual for Sears, the book covers not only the battle but the lead up to and aftermath of the battle. Very enjoyable read.
Sears is a bit notorious for his disdain of George McClellan, although fairly well justified I think. This book is now almost 40 years old, but is probably still the best single-volume work on the campaign.