Appears In: Myst, Riven, M3E, M4R, Uru: Complete Chronicles, Uru Live, EoA, BoA, BoT, BoD
It is presently unknown what exactly goes into a Linking Book to make it work. While Gehn, in the Book of Atrus, implies that knowledge of the Age you are linking to is necessary for completing a Linking Book, this information is incorrect according to RAWA. In fact, based on statements made by RAWA to The Riven Lyst in the past, it would appear that no knowledge of either Age is required for a Linking Book to work. It is assumed that a Linking Book contains a common set of Gahro Hevtee that generate the link back to where the Book was written, but beyond that, no further information is available.