Postcard books are a wonderful way for us to share our treasure trove of images. Our postcard books on Easter, Halloween and Christmas have proven to be very popular, and so we turn to one of our favorite holidays--Valentine's Day. The valentine, as a graphic token to be exchanged by lovers on February 14, became very popular in the middle of the 19th century, and continued to increase in popularity and variety as the century advanced. In the first years of the 20th century there was an explosion in popularity of the picture postcard, and it was natural that postcards would be created to send on every holiday. Tens of thousands of valentine designs were printed as Valentines. We have selected thirty favorites from our collection, and reproduce them here in such a way that they can either be removed and mailed or kept intact and the book given entire.Blue Lantern Studio Staff is the author of 'Valentine ' with ISBN 9781595830074 and ISBN 1595830073.