31 YA Mystery Books that are Absolute Must-Reads

"Summer's Edge" ($11) follows a group of best friends who return to the lake house where one of their friends died in a fire the summer before. They're there to honor their friend, but soon enough, main character Chelsea finds herself haunted by ghostly visions that ultimately lead her to realize the fire was set on purpose — and she has to find out who did it before it's too late.