The interface at Microsoft's Live Search Books has improved significantly. Previously, whenever I searched for books, it limited me to viewing no more than the first 250 results, even if the total results were 500, or 1,000, etc. But now, I see that it is delivering what it promises. I searched the phrase "Edmund Wilson" and it found 572 results. I was able to scroll through and see all 572 books--it doesn't stop at 250 any more, as I had written about previously.
Microsoft personnel had told me they were working on this problem but I wasn't sure whether to believe it or not, so I have to give credit where it's due. However, the interface is still too spartan and need an advanced search feature.
Sadly, Google Book Search still doesn't deliver what it promises. I searched the same phrase "Edmund Wilson" and Google Books claimed to find 2,442 results. However, when I tried to scroll through all those books, it stopped at 233! That's only about 1/10 of what was promised. Funny how Google always promises far more than it delivers....