What to read after Poor Folk?

"Poor Folk" by Fyodor Dostoyevsky is written in the form of letters between the two main characters, Makar Devushkin and Varvara Dobroselova, who are poor third cousins twice removed. The novel showcases the life of poor people, their relationship with rich people, and poverty in general, all common themes of literary naturalism. A deep but odd friendship develops between them until Dobroselova loses her interest in literature, and later in communicating with Devushkin after a rich widower Mr. Bykov proposes to her.