This book is an amazing compendium of High Magic from between the 2nd Century BC and the 5th century AD. It may even represent the library of a single scholar/magician, (and almost certainly has nothing to do with witchcraft, slaves or the disempowered).
The spells put to shame those in later grimoires such as the Lesser and Greater Key of Solomon. This isn't dabbling with a handful of Goetic Demons, this is binding the very Gods themselves to your will!
Some of the spells are stunning in their daring (breakfast with a god, anybody?) or their wierdness (fancy your shadow as an assistant daemon?).
Others are breathtaking in the way they reflect the cosmopolitan atmosphere of Late Antique Alexandria, mixing rabbinical, Zoroastrian, Gnostic, Egyptian, Greek and nascent Christian traditions.
There's also a scattering of quirky basic curses, divinations, good-luck charms and medical material (e.g. crocodile dung as a contraceptive) to add local colour.
This is the kind of book any amateur scholar of magic should have. It's also useful for roleplayers - it's as close as you're going to get to a real Necronomicon...