Beyond the Stone Arch by Gisela Woldenga

Ellie is staying with her grandmother while her parents go on vacation.  She loves her and they have fun together, so she doesn't mind.  But this time, when she goes out in the backyard she sees a stone arch she's never seen before.  When she gets closer to it, she hears enchanting music and wonders who's playing it....

Black Opal Books and Net Galley allowed me to read this book for review (thank you).  It has been published and you can grab a copy now.

She finds a boy named Orly playing his flute.  He asks her to help him.  He's ghost and he was murdered and he can't find his body.  Since that was two hundred years ago, she knows it won't be easy.  And her grandmother isn't real happy about her trying to help him.  She's afraid she might get hurt.  That's a valid concern.

Ellie has to learn to embrace her gift and how to use to it.  She has another ghost who helps learn.  And she faces danger she has to deal with alone.  It's good that she found a coin that belonged to Orly in the past.  It helps her in ways she couldn't imagine.  She continues her search into the truth and works on finding his body.  Her grandmother doesn't really help but she doesn't hinder her either.

She's the only one who can see the ghosts.  Most ghosts can't see her.  And she works diligently on her quest, hoping to accomplish it before her parents come to take her home.  Will she make it?