The two volumes offer the first critical edition of the entire letter-collection of Michael Psellos; a total of 563 texts, including spuria, rewritings, and excerpts. Psellos (11th c., Constantinople) is a well-known figure among students of Byzantine culture and arguably the most prolific and influential middle Byzantine learned author. His letter-collection, preserved in 53 Byzantine and post-Byzantine manuscripts, grants us glimpses into the lives of well-known but also everyday Byzantines, sheding light upon Constantinopolitan networks of friendship and power and, more importantly, upon habits of rhetorical craftsmanship, literary imagination, and typologies of self.