Carlotta, I loved the Three Investigator series! It was awesome!
Other books I read growing up include: Charlottes’ Web (natuarally), Narnia series, Anne of Green Gables, Howls Moving Castle and Black Maria by Diana Wynn Jones, Belgariad and Mallorean by Eddings, various Point Thrillers.
There are a couple of books that I just can’t remember the names of and it’s driving me mental. One of them I was sure was called The key, the secret, the garden but it’s not The Secret garden. A young girl is sent to live with her Aunt during the war and she discovers a gorgeous garden out the back. She also meets a young boy who she plays with, thinking it’s the next door neighbour. It actually turns out the boy is a ghost and no one but herself can see him. Her Father comes to get her and I’m sure he’s a doctor.I know bits of it sound similar to The Secret Garden but it’s definitely a different book. My teacher leant it to me in 1988…
The other book is a little hazer in my memory but two children live in rural England and they discover the ruins of an old village in the woods near their house. It tuns out the village was abandoned when plague hit, there may be ghosts involved but I can’t really remember.
If by any chance these happen to ring a bell for anyone, please, please[ let me know! I’d love to read them again.