The Time of the Ghost by Diana Wynne Jones
MG novel, probably ages 9+
If you have never read anything by Diana Wynne Jones, please start. Maybe not with this one if you don’t like ghost stories – she’s got a huge collection of middle grade/early YA novels that are more adventuresome than spooky (Dark Lord of Derkholm, Dalemark Quartet…) and a favorite YA+ of mine, Deep Secret. Anyway sometime last year I decided I needed to read everything she’s ever written and I just found The Time of the Ghost on my shelf. I’m only halfway through but it’s pretty delightful. A girl finds herself invisible and mostly intangible, drifting down a lane, and discovers she’s a ghost, but she doesn’t know why! Her investigation involves observing her three sisters and trying to manipulate objects to communicate. There’s some witchy magic at work, along with a British boarding school vibe. I’d definitely rather be reading it in the yard than working through my emails, and I’m confident (because I know DWJ’s books) that the early promise will pan out!