A lighthearted, clever, and entertaining series, with modern black-and-white 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 grumpy and abrupt to a polite gentleman? And what is he preparing in his little room? What’s happening with the strange and grumpy man she happened to meet on the street?

• Smart mystery plots adapted for children.
• Plenty of humor and entertaining situations.
• Vivid and relatable characters with whom young readers can identify.
• Highlighting the value of friendship, cooperation, and observation.

Ulrike Rylance is an acclaimed German author, especially beloved for her children's and young adult books. She was born in 1968 in Jena, Germany. She studied English and German Philology. She lived for almost ten years in London, where she also worked as a German teacher. Since 2001, she has been living permanently in Seattle, USA, with her family.

Children enjoy reading the series and often buy the other books as well.

“Amazing, it kept both my interest and the children's undiminished, we bought two more from the same series!”