One with a bit of overlap is Awful Books, the page of a collector who has a fair amount of science fiction, fantasy, and horror works. However, Mr. Awful (the owner’s name is not readily apparent on the website) seems to be interested far less in the writing content than the physical quality and presentation of limited and ultralimited editions, which he details and reviews with copious pictures.
And here’s his own collection of limited editions. Including not only comics and artbooks I would never contemplate buying, but even Danielle Steel limited editions (“I bought for a song on eBay [about $15.00 each]“).
And while I’m not a big fan of post-first edition limiteds, I must admit that Hill House lettered edition of Neil Gaiman’s American Gods is off the charts. (“Yo dawg, we heard you like traycases, so we created a traycase to hold your traycase.”)
Another example of bibliomania a little more closely aligned to my own
madness preferences is Mike Berro’s Vance Tracker. “This page is dedicated to tracking the location of every special edition of books by Jack Vance. Primarily limited editions, but also rare trade editions, uncorrected proofs, and manuscripts.”
I’ve corresponded with Mike for well over a decade on our shared bibliomania (for Vance and others), and he was one of the driving forces behind the Vance Integral Edition. The tracker is well worth looking at if your Vance bibliomania pegs at “fanatic.”