The medal Year book is definitely useful, however one should use it very much as a rough guide, in some areas the prices are too high, in others too low. For example I would suggest, based on current auction prices, that it is a bit optimistic on most WWII gallantry (obviously exceptional awards, such as Arnhem &C will make somewhat more) as quite a lot is appearing on the market (very much like WWI in the 70's and 80's due to anno domini). On the other hand I would be ecstatic with delight if I could buy some of the early and mid Victorian campaign medals to Indian recipients at the prices listed, unfortunately when such pieces do appear in auction I generally have to pay considerably more. Given these points it is certainly, along with the Spink publication "British Battles and Medals" a must have book for all collectors of British medals, but don't be too worried if you can get hold of copy that's a few years old It will still be very useful. Paul