Die Lied der Erlking

Die Lied der Erlking (meaning The Song of the Erlking) is a book, compiled by Wizard Peabody. It deals with lore about the Erlking.

Description
Wizard Samuel Peabody compiled the book "early last century" from the collected notes of a dozen wizards, most of whom had already died. The content of the book was considered to be mostly pure speculation. It contains collected poems and essays. Only about 1000 copies were printed.

Dead Beat
In Dead Beat, it was claimed that all but two copies had been destroyed. The remaining copies belonged to Harry Dresden and Grevane. Dresden's copy was taken by Capiorcorpus forcing him to gain what he needed from the book from the memory of Lash (who was in disguise). Grevane's copy is presumed destroyed by the failed Darkhallow.

Turn Coat
In Turn Coat, Wizard Peabody states that he has read the book in Dresden's possession, and that its German is untidy.