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.

History
The book is part of Dipper's summer reading list. Though he enjoys reading the book, his out-loud reactions and pen clicking noises disturb Mabel when she tries to sleep at night in "Carpet Diem."

Trivia

 * The Sibling Brothers is a parody of the Hardy Boys mystery novel series.