Edit – SOLVED! I’ll post a photo in the comments. Thank you all for helping me.
I’m trying to find a book I loved when I was a child in the 80s. It was called something like “The Big Bumper Book of Bedtime Stories”. It was a hardback, and fairly large. The sleeve was yellow, and it was full of short stories all illustrated in different styles.
I think about this book all the time, and I’d love to find a copy.