I would say Czech/Slovak only because of the diacritic Ř “R-breve”.
The “key” in identifying a book is usually the “frontispiece”. The first picture indicates the prayer/hymn book went over successive revisions/additions starting 1702 with the first author included being Elias Mlynarowych, editions(or hymns) through 1707, 1731, 1758, 1775, 1794, 1831 (last date printed is strong indicator/identifier, editor/city is also important if visible). Consistent with type of paper and typeface used -mid/second half 18th century - identifiable at first glance.
I think this is: Tranowskys under the T. Cithara sanctorum Hymn book. [If this is the case it would have over 20 editions, in 6 cities, and gather around 30 authores. It is referenced in “Geschichte der slawischen Sprache und Literatur nach allen Mundarten. 2e Abdr. ed. by A. Šafařík.” on page 386.]
[I may be wrong, this would require further research, method would be identifying the author names and searching for them at the national library of the Check Republic or Slovakia. From the author a list of books would be found. From there: by the number of pages, dimensions, year of edition, Collation, you would positively identify the book in hand - given the high number of editions you may hold and exemplar that is not present in the respective national library.]
[Problem with research is also the probable change in orthography convention with time that breaks google. Besides, they use “latin s”(almost a vertical line) not “english s”, and the other character variations also require some afterthought to identify clearly. Diacritics may also have changed slightly meanwhile.]
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Bibliophile
