I think wizards enchanting objects to guard their homes (or perform other tasks) would be more in-line with DF's style than specifically creating a monster that looks like a book.
Although, if there was a system to create replica artifacts, someone might create a replica and then bring it to life...
Yeah I think that makes sense for a wizard type magic user. What I'm talking about isn't some normal looking book or slab that opens up and eats you. I'm thinking more like the Necronomicon from Evil Dead, a book made out of human flesh that is animated by necromantic magic and attacks people trying to get it.
Necromancers make experiments out of living creatures, and they are surrounded by dead things and body parts, so it just makes sense to me that they would be furnishing their homes with pedestals, chests, chairs, tables, beds, etc all made from corpse bits.
Maybe that is more similar to animated furniture than a mimic though... but I was thinking more that they were still in an corpse/undead state- all fleshy and gross like in a haunted house. Think more 'a table made with human legs' than say 'a table crafted from butchered, un-reanimatable human bones'. Then when you get too close it kicks you to death.
Similar to what they are talking about in the flesh-smith thread
http://www.bay12forums.com/smf/index.php?topic=177632.0