The sacrifice box
(Book)

Five former friends must discover which of them broke the rules when objects they sealed in an ancient stone box come to life in twisted forms and dead things reanimate.

Summer, 1982. Five friends discover an ancient stone box hidden deep in the woods. They seal inside of it treasured objects from their childhoods, and they make a vow: Never come to the box alone. Never open it after dark. Never take back your sacrifice. Four years later, someone breaks the rules of the box, and now everyone has to pay. But how much are they willing to sacrifice? -- adapted from jacket