The activities of the Friends of the Castro Valley Library are supported by a large and enthusiastic group of volunteers. Their support is critical to the operation of the BookStore/Office and the book sales, publication of the newsletter and other documents, and many other functions of the organization. If you would like to volunteer, application forms are available at the BookStore/Office or you can download and fill out the PDF application form. You can then print it and bring it in to the BookStore/Office, mail it to us at the address on the form, or email it to