I accidentally stumbled on a mass of English translations of works by the current Coptic Pope, Shenouda III, at Google books. This search brings up a long list. Some have preview; some are full view, and can be downloaded in PDF form.
The first one I saw was a hagiography of St. Mark, here. The work is a modern composition in the traditional style, and references are on p.143 to sources like Eusebius HE, Jerome’s De viris illustribus, Severus ibn al-Mukaffa’s History of the Patriarchs, and other interesting-looking sources.
These books are an invaluable insight into modern Coptic church thinking. It is very good to see them accessible. For which of us could otherwise even know they existed?