A familiar story: I read a young adult novel when I was a kid. I can't remember the title or most of the plot, but I remember enough details that it drives me CRAZY.
I probably read this book in the early 90s. It was a fantasy/ghost story about three siblings who possibly travel through time. I'm pretty sure that the book is written either in first person, or third person limited.
The main character is a male middle child, in late childhood or maybe early adolescence. He has no paranormal abilities that I recall. Both his younger brother and his teenage sister can see ghosts, although you don't find that out about the sister until late in the book. While the book is told from the middle child's point of view, I think that his younger brother primarily drives the plot.
The older sister is somewhat of a stock Annoying Teenage Girl character. She tells a story about seeing Native American ghosts in her laundry room when she was a small child. The younger brother is also kind of a stock character. All young and wise and gifted and a tad mysterious because of it. A little Charles Wallace-y, but not as fleshed out.
The plot may center around the brothers traveling through time. I don't think their sister gets involved until far into the story. And the main character is put out that he is the only sibling who isn't paranormally gifted. He spends much of the book gobsmacked at everything that's going on.
I've rendered a sketchy likeness of the book's cover!
Or what little I think I remember of it. The Native Americans could be wrong, but I'm pretty sure the placement of the kid is correct.
Does this ring a bell with anyone? I have searched every resource I can think of, and have run it by everyone I know. Don't know why I'm so fixated on it, because it was just an okay book. It's probably that I'm haunted by the cover, with the kid's flying butt.