What's Hot In The Book Collecting World

I've just had fadedgiant.net recommended to me for following market trends and stand-out sellers.

For instance:

Any of the books written by J.R.R. Tolkien are currently extremely popular at auction. Especially The Hobbit and the Lord Of The Rings Trilogy. A Signed UK first edition of The Hobbit, in dust jacket, recently sold for $10,400.

There's also background information and tips on collecting and selling, and links to many other sites.