Etsy seller Paintit13lack likes to make mini necronomicon necklaces. Some are even lockets that open up to reveal images from Army of Darkness. You know the old saying: Don’t go to Comic Con without your necronomicon.
The book is said to contain an account of the ancient ones, their history, and the means for summoning them. It’s basically an old fashioned telephone book for monsters. Let your tentacles do the walking! Why the grim face? Well, it is a grimoire. Fun fact: They call it the book of the dead because of poor sales.