A romance novel or romantic novel generally refers to a type of genre fiction novel which places its primary focus on the relationship and romantic love between two people, and usually has an 'emotionally satisfying and optimistic ending.' Wikipedia

War and Peace
Lev Nikolayevich Tolstoy

Romeo and Juliet
William Shakespeare

The Three Musketeers
Alexandre Dumas

Middlemarch
George Eliot

The Enchanted April
Elizabeth Von Arnim

A Tale of Two Cities
Charles Dickens

A Room with a View
E. M. Forster

The Great Gatsby
F. Scott Fitzgerald