There is a treasure hunt at the library all summer long. The hunt starts on the screen above the Self Service Center, between the two printers. Watch for the symbol on the left to appear and get your first clue from the text on the slide.
Take it a day at a time, or plan on about an hour in the library if you want to tackle it all at once. If you need a hint, ask at any desk. Fun for all ages, but tricky enough for adults.
Try it yourself, then bring back your friends and see if they can solve it too!