I'm not sure if Propnomicon has mentioned this site before but for those looking to build a replica of the book, THE NINE GATES TO THE KINGDOM OF SHADOWS, from the film THE NINTH GATE, then is is the place to go to.
The creator of the site Michael Haspil has graciously posted downloadble content that will enable you to replicate your own version of the book. He even includes a few tutorials on how to do the binding and to weathering and aging the pages.
For those wanting something outside of the film should check out this link which had downloadable content for creating your own NECRONOMICON or any tome you choose.
Go here for more.