The Peanuts Book of Pumpkin Carols Hallmark (1971)
I found this Hallmark card/book in my grandparents attic many years ago. It belonged to my dad when he was a kid. I've seen several different variations of this on eBay and elsewhere. I'm not sure when it first came out, but it seems like Hallmark may have released it every October through the late 60's and into the mid 70's.