This "Introduction to Brentano ' is primarily aimed at conceptual interpretation even though it has been written with scrupulous regard to the texts and sets out its topics according to their chronological development. I have concerned myself at length with historical questions on other occasions, as when editing the Italian versions of the three volumes of Brentano 's Psychologies published by Laterza in 1997. Again for Laterza, and in accompaniment to the Psychologies, I have written a short Introduzione a Brentano (Introduction to Brentano) of which this book is the development.