No, ‘Salt to the Sea’ is not a sequel. It is a standalone novel written by Ruta Sepetys, published in 2016.
This gripping historical fiction explores the harrowing experiences of refugees during World War II, particularly focusing on the events surrounding the sinking of the Wilhelm Gustloff. While the novel is part of Sepetys’ work, it does not continue the story of her previous books, such as ‘Between Shades of Gray’ or ‘Out of the Easy.’ Each of her novels tackles different characters and storylines, allowing readers to enjoy them independently.