Epistolary novel Literature 

Clarissa; or, the History of a Young Lady (1748) by Samuel Richardson
Delphine (1802) by Madame de Stael
Heart (1886) by Edmondo De Amicis
Pamela; or, Virtue Rewarded (1740) by Samuel Richardson
The History of Sir Charles Grandison (1753) by Samuel Richardson
The Persian Letters (1721) by Charles de Montesquieu