Miss Bunsen accepts a mysterious invitation for a maze adventure competition, but after Pearl, Millie, and Halinka put their problem-solving skills to the test, they learn it is really a trap--for them and their school.

"Knox, a snail mail carrier, delivers packages with a smile--and a hilarious joke for each recipient. In this pun-filled Level 2 Highlights Puzzle Reader, readers must solve six mazes to help Knox deliver the mail with time to spare so he can celebrate his birthday. With bonus knock-knock jokes, Knox Knocks: Special Delivery is perfect for beginning readers."--