I can not be more pleased with Rio Bravo. It is a great ending to a great story arc. 
 Vol 4 takes us back to Clint Barton as he tries to protect his apartment and all of his neighbors from the Russian mafia. We also encounter Clint's brother Barney Barton, who is in need of help himself. What we get is a heartwarming story about two brothers. The book includes flashbacks of their childhood, and Fraction does an excellent job in making each flashback feel pivotal to the plot and allows us to feel a greater connection with Clint and Barney. 
 Clint and Barney are excellent characters. They are incredibly human and flawed, but they have so much love and determination. They are rather inspiring. 
 I love, love, love this book. I love the inclusion of sign language. I had no idea Hawkeye was deaf. It adds so much strength and dimension to his character. I want to read this book again and again.