Bogleech Book: Return of the Living
 

https://www.amazon.com/dp/B08HWP35TY

It takes place on Earth after all life has ended and been replaced by ghosts. One day, a single ghost sees a bizarre being what must be the first living thing centuries. Will she be able to convince others of her wondrous discovery? How has no one else seen one? Is it connected to the recent disappearances of other ghosts?

If nothing else, this book has probably the widest variety of ghosts I've ever seen in a book, with a number of inspired designs. Bogleech illustrated some of them here:

https://bogleech.com/halloween/hall20-rotl.html

If anyone was interested but didn't want to do business with Amazon, he recently released it on itch.io.

It's on Etsy too:

https://www.etsy.com/listing/9448903...ital-pdf-novel

I found out about this through seeing that another of his books, one called Halloween Bestiary, which is an affectionate parody of cryptozoology books only it's about Halloween decorations, is also on there:

https://www.etsy.com/listing/9448624...ry-by-jonathan