The Case of the Greedy Goat is the seventh story in the Private Investigators Club series. If you have read the introductions to the other stories in the series, you will appreciate the fact that the young detectives like solving mysteries. The story starts with Tommy reporting that he has received an invitation for the club members to have a holiday at Mr. J's cottage in return for helping him open it for the summer. With some difficulty he leads them through the formal procedures to accept the invitation. They are driven to Chaffey's Lock and taken by boat to a remote cottage on Scott Island. While working on the task of getting the water system working, their cell phones mysteriously disappear. Mr. J suspects the Greedy Goat has eaten them. The story continues as the detectives search for their phones, assist with some difficult maintenance tasks and have a few adventures. They fear that Mr. J has flipped and try, unsuccessfully, to escape. Luckily, it all works out in the end.