This time, let's talk about Blue Is for Nightmares by Laurie Faria Stelar (2003).
Stacey's junior year at boarding school isn't easy. She's not the most popular girl at school, or the smartest, or the prettiest. She's got a crush on her best friend's boyfriend, and an even darker secret that threatens to ruin her friendships for good. And now she's having nightmares again.
Not just any nightmares – these dreams are too real to ignore, like she did three years ago. The last time she ignored them, a little girl died. This time they're about Drea, her best friend who's become the target of one seriously psycho stalker. It started with weird e-mails and freaky phone calls.
Now someone's leaving Drea white lilies – the same death lilies that have been showing up in Stacey's dreams. Everybody thinks it's just a twisted game . . . until another girl at school is brutally murdered. There are no witnesses. Worst of all, no one has a perfect alibi. With everyone as a potential suspect, Stacey turns to the one secret weapon she can trust – the folk magic taught to her by her grandmother.
Will Stacey's magic be strong enough to expose the true killer, or will the killer make her darkest nightmares come true?
(taken from goodreads.com)
Gosh, I remember loving Stolarz's series so much. It was creepy and unlike any other I'd encountered back in the early 2000s. Blue Is for Nightmares combines realistic fiction in a spooky way, and I remember eagerly reaching for the next book each time I finished one. Cliffhangers, plot twists, good characters; this series has it all. If you like YA psychological thrillers, this is definitely a series you'll want to check out.