Die Lied der Erlking

Die Lied der Erlking is a book, compiled by Wizard Peabody. It deals with lore about the Erlking.

Description
(translates to "The Greif of the Erlking") Peabody compiled the book "early last century" (presumably the 20th) from the collected notes of a dozen wizards, most of them already dead at the time. The content of the book was considered to be mostly pure speculation. It contains collected poems and essays.

Dead Beat
Only about 1000 copies were printed and during the events of Dead Beat claimed to have destroyed all of them but two: the one belonging to Harry Dresden and the other belonging to Grevane. Harry's copy is taken by Capiocorpus forcing him to gain what he needed from the book from Lash's (in disguise) memory. Grevane's copy is presumed destroyed by the failed Darkhallow.

Anecdote
Although the book is not written in German, the title is, or rather seems to be supposed German for "The Song of the Erlking", but in this case is grammatically nonsensical (correct German: "Das Lied des Erlkönigs"); also, it mixes the English term Erlking in with the German words. This is acknowledged in Turn Coat, when Harry Dresden teases Peabody about it, having supposedly been told so by a Warden from Bremen.