Fyodor Dostoyevsky 
Idiot [PDF ebook] 

A Russian prince returns to Saint Petersburg after a long absence in Switzerland, where he was undergoing treatment for epilepsy. On the train he meets and befriends a man of low origins. This man becomes the dark counterpart of the inherently good prince; the two can also be seen as Christ- and devil-like figures. Dostoevsky wished to portray an unspoiled man, whose goodness is plunged into the chaos of Saint Petersberg society and a passionate contest for the disreputable Nastasya.