I have been informed that there are now only fifteen signed copies of I Reign in Hell: Selected Works left in stock with the publisher. They may be ordered here:

https://www.centipedepress.com/horror...

I assume there will also be a few available from retailers, such as Subterranean Press:

https://subterraneanpress.com/crisp-i...

But I don't know how many or for how long.