Most people using ABE don't understand how databases work. The things are rigid machines. They don't realize the software can't think. It doesn't know what you meant to type in, only what you did type, although as artificial intelligence develops, that'll change. In fact, it's already changing. Google asks "did you mean...?" But ABE just reacts to what is actually entered by the seller or shopper. One way to find rare books is to use a mispelled name or title in the search. An unsavy seller may try looking up a book, not find any for sale because they mispelled something, and then list it for a low price, not knowing it's worth more. It's a long shot, but it sometimes works to a buyer's advantage.