Browsing the shelves of a library can lead to serendipitous discoveries. But even with browsing it can help to have an idea of where particular subjects are located. The following lists will give the browsers among you a place to start.
Books on German as a language (philology, grammar, syntax, dictionaries) will be found in compact shelving on the east side of Level 1, between the call numbers PF3001 and PF3991, with most German-English dictionaries at PF3640.
German literature and the literature of the larger German-speaking world will be found between the call numbers PT1 and PT4897, also on Level 1, but not in compact shelving, as follows:
Czechoslovakia, Bohemia PT3830-PT3837.5
Soviet Union, Russia PT3850-PT3857.5
Other parts of Europe PT3895
United States PT3900-PT3921
Central and South America, West Indies PT3930-PT3948
(You can explore this in much greater detail at https://www.loc.gov/aba/publications/FreeLCC/PB-PH-text.pdf starting on page 139 for the language, and at https://www.loc.gov/aba/publications/FreeLCC/PT-text.pdf for the literature.)
The corresponding call numbers for the history and culture of these countries are found on the east side of Level 2:
Czechoslovakia, Bohemia, Czech Republic DB2000-DB2650
(As above, you can explore this in much greater detail at http://www.loc.gov/aba/publications/FreeLCC/D-DR-text.pdf.)