De Profundis and Other Prison Writings by Oscar Wilde.

De Profundis is a letter to Alfred Douglas, Wilde's lover, and The Others are letters to friends and authorities, before during and after imprisonment. There is also a Poem titled The Ballad of Reading Gaol.  

These writings provide insights into Wilde's psychological and emotional state during his catastrophic descend into bankruptcy, divorce, loss of social status and public humiliation when he was sent to prison. After almost 2 years of imprisonment Wilde decides to write to his lover, not a love letter but an account of their relationship, I guess, to set the record straight. In De Profundis Wilde lists, in impressive detail, episodes of reckless and abusive behaviour by Douglas, rows and reconciliations. The writer explains how he tried to end their relationship in several occasions but always failed. The letter also explains how Douglas and family are to blame for his imprisonment. However Wilde also blamed himself for not following his instincts. Towards the end the tone of the letter is more of resignation and acceptance perhaps revealing Wilde's spiritual growth. He acknowledges excesses in his past life and shows a resolution to live a better life in the future. 

In addition to the above, I have to confess that reading these letters was a pleasure as Wilde's writing is so Beautiful! . This edition comes with an introduction by Colm Tóibín which I recommend reading before the letter as it provides the reader with historical context.