Dory Gillestad Butler Treasure Hunters Mr. Summerling's Secret Cipher Book

Product description from producer

Marley's best friend moved to Chicago. The girl misses her very much, writes letters to her friend and waits for a new meeting. However, instead of an answer, he receives information about a meeting with a lawyer. Marley's classmates - Isla and Sai - also come to the meeting. It seems that Mr. Summerling, an old neighbor, bequeathed a treasure to the three of them, which the children must find by following the clues left behind. At heart, Mr. Summerling was a treasure hunter. Maybe he left the children money? Then Marley could buy a plane ticket to Chicago. But the adventure gives the girl something much more than money - new friends.