I wonder if you can help me find a book!
Here’s what I can recall:
– A children’s book with a cover that, I believe, featured a pretty girl in a bright pink dress, cool 60’s cat-eye sunglasses, and perhaps a head scarf to cover her blond hair, driving a convertible into what looks like a dark tunnel in a mountain.
– I want to say the main character’s name is Lydia but I’m not certain
– She ends up in a dark, spooky house and freaks out the people? monsters? living there because of all of her bright colors
– She doesn’t seem scared of any of the spooky details, and she tries to turn their house into a nicer place with bright colors
– It’s not a spooky book, it’s silly and light, probably designed for readers in the 6-10 years age range?
– Based on the way she was dressed I’d say it was set in the late-60s but can’t be sure that that’s when it was written. The colors felt more 80s or 90s to me (lots of hot pinks and neon greens).