Augmented Reality (AR) has been studied from di erent application elds since the early 60s. Different research works in the educational field have been recently conducted, particularly based on a versatile AR application called Augmented Book. This paper focuses on a novel authoring tool for this kind of books. Our approach allows the possibility of adding virtual contents to any existing printed book. The application was implemented following a framework-based approach, making easy to extend with new features. Informal evaluations and observations by academics of different elds were conducted obtaining promising results.