Hello xX_ScaredPvp_Xx,
Unfortunately I will be
Rejecting your map.
The theme isn't very original as there is already a similar map (
Bookshelves - Easy) saying that though, there are no "Library" maps, so the theme isn't really an issue.
The build isn't very attractive, from the outside it's difficult to tell what exactly it is, it just looks like a wooden cube, try adding more detail and shaping on the exterior of the build, and try to make it easier to distinguish what the theme/build is from the outside of the map.
The parkour is good. You used a wide variety of blocks and items in your jumps, which is really good. The difficulty was also good for a medium map.
The length was possibly a bit short for a medium, so I'd suggest making it a bit longer, this thread
https://manacube.com/threads/must-read-map-submission-information-format.649/ includes the average length a map should be per difficulty. Please refer to this thread when building & submitting maps.
Thanks for submitting your map! I hope to see more maps from you in the future.