Difference Between Red Book And Blue Book

In simple terms, use the Blue Book prices if you're looking to sell your coins, as this will give you a more realistic idea of what you can expect to get from a dealer. Use the Red Book if you're looking to buy, to get a better feel of what you would pay a dealer. Keep in mind there are better, more up to date price guides, but these books will give you a general idea before you buy/sell.

Rather already noted that using either for pricing is impossible. The Red Book is being sold already in April of one year and dated the following year. The 2011 has been out for about 6 Months now so unless the people at Whitman can forsee the future, any price they put on a coin is just a guess. The Blue book was orignially supposed to be the lowest possible price a coin should, could, might, would, etc sell for. The Red Book was supposed to be the highest possible price. Both are impossible unless they can forsee the future.
I think the really main difference is many people collect the Red Book but I've never heard of anyone collecting the Blue Book.
Another important thing to note is the Red Book now comes in a larger size for us old people. Also, a ringed version for those that don't want to bend the pages. Now that if versitility for you.
I'm sure there will soon be a key chain variety too.