"Girl in Hyacinth Blue" is a novel by Susan Vreeland that explores the fictional backstory of a painting attributed to the artist Johannes Vermeer. The narrative unfolds through the lives of various characters who possess the painting, each revealing their connection to it and the impact it has on their lives. The story is structured in a series of interconnected vignettes, each focusing on a different owner of the painting. As the characters reflect on their experiences, the novel delves into themes of art, love, loss, and the passage of time, ultimately highlighting the enduring power of artistic expression.