Erani the book, is in common. It's written by an unknown mystery writer. From the pages you flip through you gather it is a piece of detective fiction claiming to be based on a true story. In the story, a tiefling investigator named Dagger Sharp tries to solve the murders of several villagers in the hamlet of Briar's End.
OOC:
It will take you/anyone the down time of two long rests to read it in full.
You remember getting a bookmark out of this book from when Rangrim found the book the first time. There was something magical about the needle from the bookmark. It seemed to pulse a bit in your fingertips as you examined it.