Abstract: A book (100) includes a front cover (A), a back cover (B) and a plurality of intermediate sheets (1-11) disposed between the front cover (A) and the back cover (B) so as to define a plurality of printed pages (P1-P12), the covers (A, B) and the intermediate sheets (1-11) being bound, by means of a binder (20), on the left-hand edge of the book. A printed circuit board (30) with a plurality of LEDs (L1-L8) is disposed in the back cover (B), and slots (S) in the back cover (B) make the LEDs (L1-L8) visible. Through holes (F) are made in at least some of the intermediate sheets (2-11) to make visible the respective LED coinciding with the through hole (F). A magnetic page identifier (40) for identifying the pages that are being read is also disclosed.