I have often thought that working in a bookstore or a library is a little bit like a dispensing pharmacy. Our patrons enter through our doors, often needing assistance to find what they need. They rely on our guidance to suggest a section to peruse or a new author to read. They are looking for information and/or literary satisfaction. Whether it is a book on resumes, something to help a birth mom meet their natural child, or something to improve their child's attitude toward math - we are the person that tracks down the information, detecting nuances in the questions. We size the ages of the children and their reading ability with a few questions, and voila - we offer a few books as possible candidates. This is service in the very essence of the word. I can't think of a job that keeps you in touch with the community as much as being a library clerk.
http://www.teleread.com/books/in-the-uk-books-can-now-be-prescribed-as-medicine/