Epistolary fiction

Multatuli
Minnebrieven

Mark Twain
Goldsmith's Friend Abroad Again

Kate Douglas Wiggin
Penelope's English Experiences

George Horace Lorimer
Letters from a Self-Made Merchant to His Son

William Hazlitt
Liber Amoris

Johann Wolfgang von Goethe
The Sorrows of Young Werther
Frank Chouteau Brown
Letters and Lettering A Treatise With 200 Examples

Pliny the Younger
Letters of Pliny
Charles Brockden Brown
Wieland: or, the Transformation, an American Tale
Mary Owens Crowther
How to Write Letters (Formerly The Book of Letters) A Complete Guide to Correct Business and Personal Correspondence

Mark Twain
Letters of Mark Twain, Complete
Charles Brockden Brown
Edgar Huntly or, Memoirs of a Sleep-Walker
H. Beam Piper
Operation R.S.V.P.

Sir Arthur Conan Doyle
Stark Munro Letters

Hannah Webster Foster
Coquette, Or The History of Eliza Wharton
Marie-Angélique Du Gué Bagnoles Coulanges
Lettres de Mmes. de Villars, de Coulanges et de La Fayette, de Ninon de L'Enclos et de Mademoiselle Aïssé accompagnées de notices bibliographiques, de notes explicatives par Louis-Simon Auger
the Younger Pliny
Letters of the Younger Pliny, First Series — Volume 1

Theodore Roosevelt
Letters to His Children
Samuel Richardson
Clarissa: Preface, Hints of Prefaces, and Postscript
Ed M. Clinton
Untechnological Employment
C. H. W.
Babylonian and Assyrian Laws, Contracts and Letters
Rupert Hughes
Colonel Crockett's Co-operative Christmas
Henry James
A Bundle of Letters
Jakob Michael Reinhold Lenz
Der Waldbruder, ein Pendant zu Werthers Leiden