SOLVED. Fiction book about a man learning how other people see him and how different it is from how he sees himself

[Sulamita]

Hi, I am sorry for the vague description but that is all that I remember about the book! I believe it is a contemporary book, and the protagonist is a guy. Basically he learns how people around see him, which is different from how he sees himself. It's a book about reality and perspective. I have not read it yet, and I forgot to add to my whishlist when I read about it. Hope anyone have read it!

[Sulamita]

Found it! It is called One, None and a Hundred Thousand. The synopsis:

"Vitangelo, the protagonist, discovers by way of a completely irrelevant question that his wife poses to him that everyone he knows, and everyone he has ever met, has constructed a Vitangelo persona in their own imagination and that none of these personas corresponds to the image of Vitangelo that he himself has constructed and believes himself to be. The reader is immediately immersed in a cruel game of confusing projections, mirroring the reality of social existence itself, which imperiously dictate their rules. As a result, the first, ironic "awareness" of Vitangelo consists in the knowledge of that which he definitely is not; the preliminary operation must therefore consist in the spiteful destruction of all of these fictitious masks."