Back to the Picky documentation.
Try a few examples (on a simple database with 540 books - note that the server is on Heroku and needs a little time to ramp up):
A simple word, alan. (Finds Alan in the title, and Alans who wrote books. The title is ranked higher due to weighing.)
With qualifier, title:women. (Finds "women*" just in titles.)
With similarity, pinchn~. (Finds "pynchon", note: Only title in example with similarity. Uses a combination of double metaphone and Levenshtein.)
With choice, sp. (Finds "sp*" in many categories. Choose the one you're looking for.)
More complex, title:lyterature~ 2002. (Finds similar titles from 2002)