I have a lot of the Del Prado Osprey Aircraft of the Aces series of books which are a relatively cheap way to get hold of reference material for painting and gaming. One that I overlooked was the first in a series of two books on the Arab Israeli Wars, covering the period from the War of Independence through to the Six Day War. I was lucky enough to track an unused copy down on eBay for only four quid, so I now have another reference source for the IAF and REAF. If I ever do the Wings over Suez version of the Wings of War rules it will also be very useful.