Edmund ‘The Troll Slayer’ Ahlberg: An Unauthorized Biography is a library book which appears in "Chapter 8: The Tide Mice".
Hilda sets the book aside off-screen when Twig discovers a hidden room in the library, and does not end up reading it.
Contents[]
It is ostensibly a biography of the life of Edmund Ahlberg, one of the founders of the city of Trolberg. Since Hilda sets it aside, the specifics of its contents are not known.