These are books that I found helpful in my journey to becoming and continuing in being a wireless network engineer. I also have them in the order I think would be most helpful and productive. Notice they're all vendor agnostic.
  1. CWNA: Certified Wireless Network Administrator Official Study Guide
  2. CWAP Certified Wireless Analysis Professional Official Study Guide
  3. 802.11 Wireless Networks: The Definitive Guide by Matthew S. Gast
    Goes into the nuts-n-bolts of how WiFi works. —- This goes into to detail on how it all works. Pivotal book.*Version*=1&*entries*=0
  4. 802.11ac: A Survival Guide by Matthew S. Gast
  5. Next Generation Wireless LANs, 2nd Edition - Perahia/Stacey
    This is one deep book. Not for the faint of heart, but man is it good info. —-
  6. Driven to Distraction (Revised): Recognizing and Coping with Attention Deficit Disorder