8. Greek-Russian Church-Slavonic Reader. Ostrog, 1578, 8 unnumbered leaves, band set 127,5 x 64 mm, printing in one colour, for the first time set in two columns (parallel Greek text and Slavonic), only one in existence (stored in the State Library of Gotha, East Germany). This copy is bound with a copy of the Primer of 1578 (see below), because of what is often considered one of their books, which are referred to as ABC Ostrog in 1578. A digital version is available online.