A review by corncobwebs
The Girl Behind the Glass by Jane Kelley

Hannah and Anna Zimmer are twins, best friends, and not at all happy when their family moves from their trendy Brooklyn neighborhood to a creepy house in the country (dubbed "the house on Hemlock Road"). The narrator is a mysterious omniscient entity who has special knowledge about the house's past inhabitants, and repeatedly refers to the terrible things that have happened there. Not surprisingly, strange things start happening as soon as the Zimmers move in: the older sister, Selena, is terrified by something she sees in her closet; mysterious breezes crop up around the house when no windows are open; and Hannah starts hearing a ghostly voice. Most distressing of all, though, is the fact that the longer the Zimmers live there, the more they fight with each other. Clearly, there is something very wrong with the house - but it takes a near tragedy for the family to understand. As the book draws to a close, all of the pieces start to fit together and the reader finally learns the whole story about the house on Hemlock Road, including the identity of the mysterious narrator. A great ghost story that will appeal to readers who liked "Wait Till Helen Comes" by Mary Downing Hahn.