De Pretis’s book focuses on the epistolary features of Horace’s First Book of Epistles, reading them from points of view related to the epistolary form: the weight of the addressee; the dialogue between literary genres; the poet's self-representation; temporality; and the power of the author. These issues also pertain to literature as such, since all literature can be regarded, to a certain degree, as "epistolary." But the extent and consistency with which the Epistles explore epistolary aspects, can only be explained in terms of their generic affiliation.