SOLVED. YA Fiction series about high school girl who can talk to the dead. Read 2008-2011.

[Kelsey]

I’m looking for a book series about a girl (possibly in high school) who can see and communicate with the dead. I read it in middle school around 2008-2011, and I might have gotten the book from a Scholastic book catalogue.

What I can remember:
-Her mom had passed away or disappeared, so she lived with her dad.
-One of the books was set at a boarding school or a prep school. She was communicating with a ghost who had been a student at the school. The ghost might have been bullied or was trying to harm a popular group of girls.
-One of the books involved her having a sleepover with friends who tried to get her to communicate with the dead (possibly her mom?). For some reason I feel like her house might have had some sort of tower and/or garden where this took place.

I’ve searched online and some folks say it might be The Mediator series, but I’m not sure that’s it. Maybe I’m misremembering and confusing two book series together! Any help or ideas are appreciated :)

[Becca]

The Gilda Joyce: Psychic Investigator series? Her dad has passed away and she lives with her mom and brother, though, which is the opposite of what you remember.

[Kelsey]

That’s exactly it!! Thank you!!

[Kat]

Gilda Joyce: Psychic Investigator for the link to Becca's suggestion.