The Rilloby Fair Mystery

The Green Hands Gang strikes again!
Thieves have stolen rare and valuable papers, and seem to have escaped through locked doors and fastened windows. It seems that there is a connection between the gang and the Rilloby Fair where Barney is working.
Barney, Roger, Diana and Snubby love solving mysteries and this is their second adventure!
The Barney series (also called the Barney ‘R’ Mysteries because each title begins with the letter R) is all about siblings Roger and Diana Lynton, their cousin Snubby and their circus friend Barney. Together, the four, along with their pets Miranda the monkey and Loony the spaniel, embark on all sorts of adventures – from cracking curious cases to busting smuggling rackets.