This is a rare religious text in Bulgarian language, printed in Istanbul.
The author Avercius (Averkije) Petrovic (ca 1815-1878) was a Bulgarian author, translator from Bulgarian and Serbian and scholar, who worked in Gabrovo (1839-1845), Sopot (1849-1850, 1857), Vidin (1857), Belgrade, Dresden and Istanbul. In 1873 he was appointed the metropolitan of Vratsa in Bulgaria.
He spent his last years working in Istanbul, where this book was published.
We could not find any examples on Worldcat.