Lost Classics of Teen Lit: Name That Book!

I’d love to find a middle grade book from the 70’s where a boy goes to stay with his uncle for the summer. The first night there someone spells out his name in Morse Code. (Later find out it was boy same age trying to be friendly, not threatening.) The house is near water with caves that at low tide you can go into. At the end, the bad guy chases the boy into the caves. I believe the title implies something supernatural but the problems are being caused by the bad guy. Thank you!

Various POVs of how people appreciate/utilize time, one person has cancer and they want to have more time, another wants the time to go by quicker. In the end, the lesson is to teach us to value our time no matter the circumstances

I read a book in middle school or high school, and I’ve been looking for it for so long. It takes place in one of the maritime provinces of Canada in what is implied to be post nuclear war. The main character lives in a society of people who outcast anyone who has a mutation, and his uncle is one of those outcasts. The main character develops a mutation where he is telepathically connected to a few other kids around his age. They hide it as they are afraid of getting kicked out of their society. They are found out eventually because one of them was hurt and the others felt it and reacted as if they feel it too. They are outcast and discover that there is a wider society of outcasts, there’s a helicopter (???).

It’s a children’s chapter book (probably aimed at 4th-6th grade) about a girl living in (I think) upstate New York (definitely somewhere in the northeast) who discovers that the old house she’s living in is haunted by the ghost of a girl around her same age who died after falling in a frozen pond on the property. The whole thing was set in the winter and there was a lot of Victorian Christmas imagery. My memory is fuzzy around the plot but I remember something to do with a red velvet Christmas dress, I think the ghost girl was wearing it when she drowned? I also think the protagonist may have fallen in the same pond after a sledding accident and was potentially saved after seeing the girl in the red dress? That part I may be conflating with something else but I definitely remember the dress being worn by someone in peril in the frozen pond.

okay I think I read a book when I was young and I’ve been trying to remember what it is forever. At the point where I possibly could have dreamt it?? A girl lives in a house and befriends a ghost with orange/red hair. I think theres a cat involved. she goes with the ghost to an underworld. That’s all I remember! Help!!!!

A book that my mom read to me in the pre 2010s i believe? there was a group of siblings, a train ride, a venus flytrap pet, ponds?? A swampy setting?

the book i’m looking for was a steampunk manga, about a girl who takes a bus/(transport?) to her new boarding school, but takes the wrong turn. she ends up at a school full of odd creatures, not human, including a bunch of faculty that are basically robots/cyborgs. a mix of cyberpunk technology parts & pieces of various prople. the book spans her defeating these faculty who want to destroy her (i think they want her body parts because she’s youthful and it will extend their life? and they were trying to extend their life as long as possible)

I’m not sure when the book was published, but the copy I read was a little pocket copy, maybe brown or grey? There was a librarian who knew everything and the little girl main character would sit and talk to her on the stairs outside the library

There was a little mouse family that lived on a farm, it was a novel though not a picture book, and they lived in an old tin can? And the farmer plowed the field with a machine for the first time and there was a tense moment where they almost lost a baby mouse

Looking for a children book. On the cover was a man in a top hat traveling around in a submarine.