Since it is epistolary, the entire plot is revealed through the correspondence between the two protagonists.
The book you are looking for is likely by Blanca Santoro (often confused with the title "Cartas a una dama blanca"). It is a Victorian-era epistolar novel available as an eBook on Amazon . Book Overview Genre: Victorian Romance / Epistolary Novel. Setting: London, 1846. Cartas A Una Dama Blanca Santoro epub
The book evolved from a personal challenge the author set on Instagram to write one romantic letter, eventually growing into a series of 64 letters. Reading Guide Since it is epistolary, the entire plot is
To fully enjoy this short novel (roughly 70 pages), focus on the following elements: Since it is epistolary