Youthful, light-hearted, clever, and entertaining series, with black-and-white modern illustrations, plenty of humor, many mysteries, and quite a few comical situations. Penny is 10 years old and her dream is to become a detective. She sees mysteries and suspects everywhere: What's going on with the bloodthirsty neighbors? Why has the school janitor transformed from sour and abrupt to a gentleman? And what is he preparing in his little room? What’s happening with the strange and grumpy man she accidentally met on the street? Penny knows many methods of solving crimes well, and she is equipped with the necessary tools!

Penny is 10 years old and has three big wishes
(and about a million smaller ones):
1. To get a dog.
2. To become a detective and solve police cases.
3. Not to go to Flora's birthday party, the boastful old goat.
In the end, not only is wish number 3 not fulfilled, but Flora's party is as silly as she feared. However, Flora's most beloved gift disappears: Justin, the cutest little dog in the world, and in his basket, there is only a threatening note. Penny takes on her first case, thus fulfilling wish number 2. And maybe even number 1...