The Art Of Necromancy

The Art of Necromancy is a grimoire dedicated to the magical practice of necromancy.

History
When Lancelot's strange behavior led Merlin to believe that he'd been raised from the dead, he consulted a book of necromancy for more information. He later used a pentacle enchantment described in the book to determine that Lancelot was a Shade (Lancelot du Lac).

Trivia

 * This book bears some resemblance to the volumes that Merlin found hidden beneath Agravaine's bed, which may imply that they're part of the same set (The Secret Sharer).