The Chronographia (Greek: Χρονογραφία) by Michael Psellos is a history of the Byzantine Empire in the century from 976 CE by Michael Psellos, who was himself an active courtier and political advisor during the latter part of this period. His chief interest is in the character of individual rulers, which he considers in fourteen biographies of individual emperors and empresses, from Basil II 'The Bulgar-Slayer' to Michael VII Doukas.
Free online texts
Documenta Catholica Omnia: Chronographia, translated by E.R.A. Sewter (1953). PDF format.
Fordham University Medieval History Sourcebook: Chronographia, translated by E.R.A. Sewter (1953). HTML format.
Internet Archive: The History of Psellus, edited by Constantine Sathas (1899). PDF, EPUB, DJVU, Kindle and other formats.