A popular science book by a famous physicist, explaining scientific concepts like atoms, thermodynamics, and relativity through the imagination of a bank clerk who dreams about entering alternative worlds where these concepts are plain to everyday sight.
Pick up between 9am and 5pm any day except Sunday. Location is 3 minutes' walk from West Croydon Station. Priority given to people who are nearby, and who tell me in their first message exactly when (date and time) they want to come.