If money is a issue - you can basically get a red book from any year - not much has changed since the 90s. I picked up a coin book for free at the coin shop, and it contains all the info I usually look for ( key dates, and mintages )
Well I got the red and blue book but I find myself using the blue book more often because I am more interested in what I could sell coins to a dealer for, rather than what I would charge if I became a dealer. The values in the red book seem far too high, especially for wheat cents, which is the main section I look at.