Some other good books on helicopters in the Vietnam war.
In no particular order:
Hunter killer squadron by Mattew Brennan - about flying gunships in the 1st squadron 9th Cavalry
The price of exit by Tom Marshall- huey and oh-58 flying in the 158th aviaton battalion 101st Airborne
Lest we forget by William C Meacham - the Kingsmen 101st aviation battalion flying huey in support of LRRP'S and SOG
Wings of the Eagle by W.T. Grant -flew in the same unit as the above around the same time
Centaur Flights by Richard D Spalding- Cobra pilot in D troop 3rd sqadron 4 th cavalry 25th infantry division
Apache Sunrise by Jerome M Boyle- Cobra pilot with apache troop 1st of the 9th Air Cavalry
Bonnie Sue by Marion F Sturkey A - CH-46 pilot with marine squadron HMM-265
Seawolves by Daniel E kelly -huey doorgunner in HAL-3 in support of Navy SEALS in the Mekong Delta
I managed to get all of these from Amazon here in the UK hope this helps
Regards
BTT