This is one of a series of activity/observation game picture books focusing on a single day in a busy place. This book is set at the factory, where people come and go, and lots of different things happen. At the back of the book are some fold-out flaps with lists of puzzles to solve on every page. Philippe Dupasquier has also produced three "Robert" books, "The Great Escape", "I Can't Sleep" and "Follow That Chimp!", which was originally published in serial form in the children's magazine "Snap".
