Check their opening hours on the Library web page before you go. Don't forget your local public library. Lancashire County Library Service has a computer Catalogue which enables you to search all their libraries from your local library, and to request books to be transferred for you. The computer Catalogues of other libraries can be searched on the web. The following classmark list is not exhaustive, but indicates the main classmarks for health.
Some topics have more than one classification to reflect different applications.
If you are looking up a book on the Catalogue, remember to check the location of the book.