What I am wondering is if anyone has an exact (or close to exact) estimate of how long Linden has been in the Land? How many days/weeks/months have passed since she first appeared on Kevin's Watch in Runes of the Earth up until the end of Fatal Revenant?
Sure . . . I guess I could do the leg work myself, but certain time constraints make reading the books over and noting the passage of days difficult at the moment, so I thought I would throw this query out there in case anyone happens to know.

Best estimates are fine if no one knows for sure . . .
