De profundis and other writings - Oscar Wilde

De profundis is a letter that Wilde wrote to his former friend Bosie while serving his sentence at Reading jail.
It's a long, beautiful and very sorrowful text where the author tries to explain the sequence of events that lead to his imprisonment, what his friend's responsibilities were and what mistakes he himself made (mostly out of weakness and kindness, in his opinion).

The ballad of Reading Gaol - Oscar Wilde

Oscar Wilde, the famous Irish author, was incarcerated in Reading jail due to a homosexuality-related scandal.
In this work, a ballad as rhyme and metric are concerned, Wilde talks about a man who is sentenced to death penalty for having murdered his wife.

Angela's ashes - Frank McCourt

I'm not sure how Frank McCourt managed to write such a heart rendering story about poverty, alcoholism, child mortality and hunger that still paints lots of smiles on the reader's face. It's a wonderful gift for an author and a story teller in general.