Richard G · Richard W. · Richard Wolfrik Galland · W G
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Cities of the World: Extreme Spot the Difference | 978-1-62686-248-7 (1-62686-248-6) | 2014 |
| Sports and Games: Extreme Spot the Difference | 978-1-62686-250-0 (1-62686-250-8) | 2014 |
| Wonders of the World: Extreme Spot the Difference | 978-1-62686-249-4 (1-62686-249-4) | 2014 |