SOLVED. Book about a detective, a clairvoyant and Pushkin

[V]

Hi all
Around a year ago I went to my local library and saw a book that caught my attention: it was in a box that contained a novel and a notebook with annotations made by the main character. The main character was a detective that had conversations with a clairvoyant that sometimes was a man and other times a woman. He also maintained conversations with Pushkin, who was said to be of african-american origin.
I remember that the author was european, czech or romanian maybe, and it was contemporanean (1900's - to date).
I'm sorry I can't provide with anymore details, any help would be appreciated and thanks for reading this!

[V]

I found it :) in case anyone is wondering, the author is Milorad Pavic and the book's name is Unique Item