Postcards were collected right from the start, and are still sought after today by collectors of pop culture, photography, advertising, wartime memorabilia, local history, and many other categories.

AbeBooks sold a first edition of Harry Potter and the Philosopher's Stone for $88,140, one of only 500 copies printed. Do you have a valuable Harry Potter book? Learn more with our guide to collecting rare Harry Potter books.

In 1941, with Britain facing invasion by Germany, Collins published series of social history books called Britain in Pictures to create a record of British life. George Orwell, Graham Greene and Edith Sitwell were among the writers to contribute books. Today, these books are highly collectible.

From Egyptian wall paintings and Greek sculptures to the emergence of abstract painting and Pop Art.

Sandra Hindman is a leading expert on Medieval and Renaissance manuscript illumination. Professor Emerita of Art History at Northwestern University and owner of Les Enluminures, Sandra is author, co-author, or editor of more than 10 books, as well as numerous articles on history, illuminated manuscripts and medieval rings. AbeBooks posed a number of basic questions about medieval manuscripts and Sandra was kind enough to answer them.

A limited edition book is one where the number of copies in the print run has been strictly defined prior to its issue, and that number is substantially less than a standard print run, and then no further print runs are issued after the first printing has sold out.