Creating a specific logo for a library classes

I am looking for a modern logo that can be used for an existing business. The logo needs to adhere to certain colors and symbols that I have in mind. I am very particular about the design that I would like so I need someone who is experienced and able to create something stylish and unique that I can use for my business. Also, I understand that logo design can be a complex process so the freelancer I choose needs to understand the requirements I have set out and be able to demonstrate previous work to prove they are confident in their craft.