iv had the 2013 redbook for a wile now whats the difference between them besides value wise redbook is retail blue is what a dealer might pay is there more info on history or any thing better in the blue book
Forget the Blue Book, don't bother to buy it. And while you're at it, forget any price/value you see in the Red Book. The Red Book is an essential book that every collector of US coins needs to own. But when it comes to values, you should just block that part completely out of your mind.
I haven't purchased a Red Book since 1956, so I was surprised to see a number of errors regarding mintage figures: http://news.coinupdate.com/a-few-errors-in-the-red-book-1317/
it even tells ya in the red book that the coin values should only be used as a guideline and not actual coin pricing. the knowledge in the red book is well worth the purchase. especially for noobs like me.
By the time the Red Book hits the market the prices are 1-1½ years out of date. Auction results are best (Heritage or Teletrade and on lower valued items, eBay). Next best would be something like Coin Values (comes with a Coin World subscription). The greysheet (Coin Dealer Newsletter) is nice but not as comprehensive AND much more expensive.
For general knowledge on US coins, the red book is great. For prices, not so much. The modern mintage figures can be expected to be corrected in the years following the year of production. I heard from someone (Ken Bresset I think) that the mintage in the few years following production for moderns is not exact because the mint hasn't released the exact numbers yet.
