The Second Summer of the Sisterhood (also known as The Second Summer) is a novel written in 2003 by author Ann Brashares.

The story continues the adventures of four best friends who own a magical pair of jeans that fit all of them, even though they are different sizes.

During the summer, the girls share the pants.

The book is the second installment in a series of five books: The Sisterhood of the Traveling Pants (2001), Girls in Pants (2004), Forever in Blue (2007), and Sisterhood Everlasting (2011).

The book was one of three adapted into a film The Sisterhood of the Traveling Pants 2 (2008).