A simple cache. Shouldn't be hard to spot.
It's part of a series of caches that will provide clues for the final which is based on a much-loved book.
There is no clue in the cache. To find the clue you need to look around you. What do you observe within a 25 metre radius of GZ? Perhaps you could note down what you see for future reference when solving the final puzzle.
You will almost certainly need tweezers to extract the logsheet.
Stealth will be needed if accessing during business hours.
Please, no spoilers about the puzzle in your log.