I’m not 100% sure of who you’d list as the publisher - there is no indicia in the book It was put out through Zoop, but I don’t think I would consider Zoop a publisher so I kind of think it is ‘self published’
In my mind there is an A, B & C - there is the standard HC, then is the signed HC with a tipped-in plate and the remarked HC with again the tipped-in plate and a head sketch as well as the signatures. The standard edition does not have the plate. I will included the Zoop reference below.
Title: The Whistling Skull - Special Edition Hardcover
Issue: HC
Variant: C
Barcode:
Description: Signed and Remarked on tipped-in plate
Cover Artist: Tony Harris
Publisher: self published
Release Date: 2023
Country: USA
Format: HC
Pages: 168
Writer: B. Clay Moore
Layouts: Tony Harris