There is 5 books in the series. All five are included in purchace. On the back of book on The Shadows it says - " There is something spooky about Olives New house. When eleven year old Olive moves into the old house on linden street, She knows there is something weird about the place. The creepy antique paintings. The 3 very unusual cats. But the weirdest thing? When Olive finds and puts on a pair of old glasses, she can travel inside the paintings to elsewhere, a sinister world with strange secrets to keep. Soon olive finds herself caught in a dark and dangerous plan. Can she confront the powers in the house that want to get rid of her and her family ... Before the lights go out for good? "