Hints
You can download and read the hints as a PDF. Printing the PDF will give you a chance to record your answers. Reading it will give you a quick hit of satisfaction and may even be enough to solve the hidden puzzle.
Note: if you stumbled upon this page without knowing why, you may want to get a copy of Mind-bending Variety Puzzles Volume 1. It contains a secret puzzle and you have found the hints for that secret!