Need suggestions on my next read!

I am currently reading Dostoevsky from 6 months and have completed White Nights, Crime and Punishment and Demons...

I don't plan to read The Brothers Karamazov any time soon before that I want to complete most of Dostoyevsky's other works

Which one should I pick next out of The Idiot,The Adolescent and House of the Dead?

Kindly suggest your reason for the books you suggest without any spoilers.