I don't know the name of it. It was a book of black and white sketch like drawings of different pretend monsters, but not cryptids. They may have been monsters that looked like household objects, one of them was possibly a coat hanger type thing. Each page had a description of a monster and then a black and white picture/sketch of them. It was definitely published before 2015 and was meant for either children or preteens.
Stump the Bookseller
New format, same book stumper solving.
I’m not familiar with the story, but it seems like it could be :
A Manual of House Monsters, Marijanovic, Stanislav
https://www.abebooks.com/book-search/author/marijanovic-stanislav/
This isn’t it but thank you for trying!
I wondered if it might have been *Flanimals* by Ricky Gervais, but the illustrations for that are in colour.
There was a similar book in my library that has since been discarded. I thought it was called The Book of Monsters, or possibly just Monsters. I don’t remember the author, but I know the name started with either O or P…and I’m leaning towards O. Ostereen? Osteen? Something like that. There were actually two books, with similar premises and titles. Good luck!