This clever picture book builds from one silly moment to another as two siblings convince themselves that the footprints they have discovered belong to a dinosaur. Sally and Joe spot some strange footprints one afternoon. Who could they belong to? They're big, heavy, and squiggly... As this brother and sister pair follow the clues, the tales they tell themselves grow even more wild until suddenly the trail goes cold! Sally and Joe decide to set a trap, but are they ready to face what they'll find? This quirky caper from Alex Latimer is a hilarious story-time read aloud. With bold visual storytelling, this intriguing mystery will test readers' deductive reasoning from start to finish.