Retail sales at bookstores during December reached $2,090 million, up just    .05 percent compared to December 2004, according to recently released estimates    from the Bureau of the Census. This is the second month in a row that sales    were up slightly compared to 2004 results. However, estimated bookstore sales    of $15,924 million for all of 2005 were down 1.8 percent from the previous year.