Annotations for Obsidian Pebble

Baker & Taylor
Eleven-year-old Oz Chambers finds a package from his late father that contains an obsidian pebble, an object with scientific powers that offers clues to the secrets Penwurt--the haunted house where Oz and his mother live--harbors.

Midpoint Books
11-year old Oz Chambers lives in a haunted house. His mother wants to move, but Oz would rather do double algebra (yuck) every day for twelve months than leave.