Well, thanks to you guys I finally took advantage of that offer (right in time too) and bought...
The Brief Wondrous Life of Oscar Wao by Junot Diaz

I had a look at the excerpts of the Leiber books and decided I didn't much care for his writing style - I guess my tastes have changed since I read his books years ago.
The excerpts are very useful, I wish FW and other stores had it more often. That's one of the Amazon features I miss.