Dear manager:
I have noticed some setbacks of our library recently. First of all, our book variety is not enough (not bad, but I would suggest saying something such as, "We do not have an appropriate variety of books." or, "We need more variety."). I went to the Main Library in the neighboring county (you can put, "in the next next county" or the name of the county instead if you'd like) as inspection to inspect. Their collection of books, ranging from acadamic textbooks, recipes, illustration even to comics, are profoundly abundant (love the word choice!). I even found the novel, first edition, of George Orwell which is has been out of print since 1970. In light of this, if we want our visitors back, broadening our collection is definitely first task should be our first task.
Secondly, we should be multi-faceted. Libraries nowadays are not  (you can include "only" here if you'd like) places that provide only  (be sure to either put the word "only" either before "places" or before "passive knowledge") "passive knowledge" but also "active knowledge". We can take place schedule workshops and speeches on a weekly basis (or, "Workshops and speeches can take place weekly."), inviting endemic writers and directors to share their experience of innovation and life, which is a good way to strengthen the connection and loyalty with our (or "the" instead. You could also put, "loyalty within our/the county) neighborhood.
Last but not least, i I suggest we remodel the library. Our library fails to provide the cozy atmosphere of reading (or, "...cozy atmosphere that comes with reading."). The light is too dum dim and may (let's not assume) depresses people. We don't provide enough chairs and sofas. There's no audio area, and (connecting the sentences) And the infracture infrustructure (if that is what you mean) breaks down from time to time.
I do believe that we'll pull through this as we just still have a lot of work to do.

I added some suggestions for you to choose from if you'd like! Also, I apologize for the random comment below! I was in the middle of correcting your message and for some reason it submitted two comments when I pressed the send button twice to update my reply. Have a nice night!

R