Requiem: A Hallucination is a book in which the narrator is obviously a persona of the author. The action takes place within a single day - the action being a dream, an hallucination of the narrator. The narrator is introduced as he is annoyed that the person he is to meet has missed their appointment at 12 noon - only to realize that 12 to a ghost is more likely midnight. The person he is to meet is not explicitly identified but is most likely the poet Pessoa.
The narrative then covers the time until the midnight meeting. In this time the narrator meets a drug addict in the park, a seller of lottery tickets, a gypsy who reads his fortune, a dead friend, a madame of an unsavory hotel, his deceased father, a barkeeper, a painter of details from the Temptation of St. Anthony, a lighthouse keeper's wife who is caretaker for a house in which he once lived, a former lover, a seller of stories, and finally the intended guest. Along the way one gathers recipes, literary history, a bit of philosophy ...
I highly recommend this book; it is an excellent text to first encounter Tabucchi.