Musical Secrets: Music Library

- Difficulty: 1.5 of 5
- Area: 1 of 5
- Cache-Size: special
- Coordinates: N 52° 21.451 E 009° 40.217
- Position: South/West
Musical Secrets: Music Library
Part of the GeoTour "Ge(o)heimnisse der Region Hannover"
This cache is feasible only during the opening hours of the library! The City Library Hannover offers a wide range of media, which supports music education. 50,000 sheet music and 8,000 CDs and music DVDs are available for check out, in addition to a wide range of music literature.
Simply rummage around the library yourself and you might pick up the cache along the way.
BONUS CODE: _ _ _ _ _ _ _ _ _ _ _ _ _ (1st Latter)
To determine the bonus number you have to figure out the digit sum, which is a single digit.
Additional Hints (Encrypt)
a rather "classical" hiding place