The Sibling Brothers by Jenkins W. Jenkins, is a series of mystery novels. The book that Dipper enjoys and reads as part of his summer reading list is The Case of the Caper-Case Caper.
The book is part of Dipper's summer reading list. And while he enjoys reading the book, his out-loud reactions and pen clicking noises disturb Mabel when she tries to sleep at night.
- 116. "Carpet Diem"
- The Sibling Brothers is a parody of the Hardy Boys mystery novel series.