I reported this bug in another thread, but it didn't get acknowledged.
There's a bug in search bookstore whereby the settings for Match Case and Match All Word Forms isn't being respected.
If you're trying to find books to buy, you need to be specific, and the latter bug in particular has caused me a great headache. Thankfully, I've found a workaround by which if you specify a wildcard then Match All Word Forms is switched off — but that's not always possible.
