What Makes a Book Rare? By Michael Lear, Rare Collections Librarian State Library of Pennsylvania Libraries with rare or special collections may be asked: what makes a book “rare” or valuable? Probably the most often thought of factor by is that a book is old. This is sometimes...

      by Michael Lear, Rare Collections Librarian State Library of Pennsylvania Identification of photographs Identifying the type of photograph(s) that you have helps to date an image and can be key to determining the best handling and storage conditions. Some...