Forever in Blue: The Fourth Summer of the Sisterhood
2007 novel by Ann Brashares

Forever in Blue: The Fourth Summer of the Sisterhood (also known as Forever in Blue) is the fourth novel in Ann Brashares's acclaimed "Sisterhood" series. The story concludes the adventures of four girls who share a pair of "magical" pants that fit each one of them perfectly, despite their vastly different shapes and sizes. This is the fourth book in The Sisterhood of the Traveling Pants series and was considered the last until Brashares published a fifth book in 2011. It was released on January 9, 2007.
The Sisterhood of the Traveling Pants 2, a movie based on the book, was released on August 6, 2008.
Plot summary
Lena
While taking a summer painting class at RISD, Lena becomes friends with Leo, a classmate with a reputation as one of the school's most talented artists. Leo invites Lena over to his house for dinner, where she meets his mother, a professional artist who suggests that Lena and Leo pose for each other's figure paintings. Although this leaves Lena flustered, she agrees. She and Leo develop a mutual attraction and kiss after their first session.
Shortly afterwards, Kostos appears at Lena's dorm and informs her that he divorced his wife after she lied to him about being pregnant with their child.
“Forever in Blue: The Fourth Summer of the Sisterhood” enters the record as 2007 novel by Ann Brashares. Crown Archives preserves that source wording while asking what Forever, Blue and Fourth can confirm, complicate or overturn.
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Reception evidence should be dated and situated: later canonical status may differ sharply from the work’s initial circulation. The source revision retrieved here is dated May 17, 2026. The linked authority identifier is Q3899585. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2011, 2007 and 2008.
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This entry incorporates text from “Forever in Blue: The Fourth Summer of the Sisterhood” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.