What Makes a Book Rare?
The reasons that people collect certain types of books are varied and highly personal. A buyer may collect first editions from their favorite author, or their interest in collecting books may be incidental to the larger interest; such as an avid Beatles record collector acquiring the books of John Lennon as part of his collection. Ultimately, though, the value of a book as a collectible is directly related to the book's relative scarcity. When a lot of people want a book and there are few copies available, that book's value increases.