Here is a copy a little more beat up but cheaper:UH78 ARMED GUARDIANS, One Year in Iceland, Prepared by G-2 Section, Iceland Base Command, December, 1942, Reykjavik, Iceland, softback, ex libris, 96 pages, good condition, $17.50
http://www.overlordmilitary.com/unithistories.html
and here is a file that should help you find the Air Force records:
US Air Force: Guide to Documentary Sources
http://www.airforcehistory.hq.af.mil/Publications/fulltext/Guide_to_Documentary_Sources.pdf
You all are much to great, I happened to check on the one you posted for $17.50 as originally posted. I did see one for $40.00 as well. I called the guy in MO, although he never called me back after I talked with him. I talked with another individual who has the same book, unfortunatly he said its not a year book as you may think. In fact it doesnt speak of any units and only has 3 pics with like 2 or 3 pages about the engineers but doesnt give any info about the Units. He said for whhat Im after its not very usefull.