that's the Judy Blum that wrote all the kids' books ;) Probably why I have the name of the husband/wife authors misremembered. I was in elementary school in the 70s, and about half the the reader texts had that Blum's stories in them

I think the kid's fiction I read was mostly the 3 investigators...but what I mostly read was the UFO/ghost/Bigfoot stuff.

I got focused on natsec in high school tho; if we lived in a better world, I'd be a "paranormal" researcher