Why are the names of the ages of Myst not written on the books you use to link to them?
Linking and Descriptive books used in D’ni were usually labeled with the names of the ages that they described and/or linked to, but numerous cases have been uncovered where no names were provided, or only representational symbols were used to entitle books. Since the events described in the D’ni history of Atrus did not indicate what Atrus’ books looked like, we provided our best guess in the game itself.