The secret of anonymous letters. Book 4. Bliton E.

Young detectives and the dog detective again together and are ready to investigate the most mysterious affairs.

But alas, in Peterswood everything is calm and nothing unusual happens, except for the unexpected departure of the Gladys of the Maid Pip and Betsy. The guys are sure that everything is not as simple as adults say, and they are right.

residents of Peterswood, one after another, they began to receive unpleasant anonymous messages. Who is the author of these mysterious letters?

This secret will be revealed by five young detectives and a dog detective!