The Schools of Arcane Magic - Necromancy

"The Schools of Arcane Magic - Necromancy" is a book in Dalaran which is related to the Higher Learning achievement. You can dig this up out of the bookshelf in the second floor common room of the Legerdemain Lounge.

This book appears in the Legerdemain Lounge. Go to the second floor, in the room to the left (west), on the usually empty bookshelf.

Alternate book-spawns appear to be The Archmage Antonidas - Part III and To Do Today.

The timer for respawns is between 3 and 4 hours. So if you see a comment in Trade chat, or the specific channels such as higherlearning (type /join higherlearning to see it), aim to return in three hours and calculate the respawn period for the book from there.