From the creator of I'm Going to Build a Snowman comes a surprising celebration of community helpers that captures the joy and wonder of being a kid, centering around a precocious girl whose favorite day of the week is Monday.

Every Monday, Mabel wakes up early and peeks out her window to make sure she didn't miss the one thing she's been looking forward to the whole week. She drags her chair down the hallway, past her big sister and Mom and Dad, out the door, and waits.

What is Mabel waiting for every Monday? According to Mabel, it's the best thing in the world. But no one else in her family seems to understand...until they see what's honking down the street!