"Mathilda" is a novella written by Mary Wollstonecraft Shelley, the English author best known for her iconic work, "Frankenstein." "Mathilda" was composed in 1819-1820 but was not published during Shelley's lifetime. It remained largely unknown until it was discovered and published posthumously in the mid-20th century.

The novella tells the story of Mathilda, a young woman who recounts her tragic life experiences through a series of letters and narratives. Mathilda's life is marked by sorrow and isolation, stemming from her complicated relationship with her father. The story explores themes of love, guilt, and the consequences of forbidden desires.

"Mathilda" is a departure from Shelley's more famous work, "Frankenstein," as it is a dark and introspective tale that delves into the psychological and emotional struggles of its protagonist. It is often considered a Gothic novella due to its melancholic and emotionally charged narrative.

While "Mathilda" is not as widely read as "Frankenstein," it offers readers a glimpse into Mary Wollstonecraft Shelley's talent for exploring the complexities of human nature and emotions. The novella is a poignant and introspective work that continues to be studied and appreciated for its literary merit and its contribution to the Gothic genre.