List of recommended commentaries on Dostoevsky and Christianity - Dostoevsky's religious views in his novels.
Dostoevsky and Christianity are inseparable.
When we think of Christianity, we tend to think of Catholicism or Protestantism, but Dostoevsky's faith was the Russian Orthodox Church.
When you read Dostoevsky with such background knowledge, you will see a completely different view of the novel's world from what you have seen before.
Knowing Christianity is very helpful in enjoying Dostoevsky.