The Spiderwick Chronicles by Holly Black and Tony DiTerlizzi

The Spiderwick Chronicles by Holly Black and Tony DiTerlizzi is an exciting story about three siblings, Jared, Simon, and Mallory Gracee, and their mother. The story begins when family moves into their great aunt's house (actually, their grandmother's cousin, not sister, so their more distantly related, but since the cousins grew up like sisters, they call her their great aunt).

Their parents recently separated, and Jared is having the hardest time of it. They get enrolled in a new school, and Jared begins to have problems again. But school problems are not the only difficulties they have. Jared and his siblings begin to discover that their new house is very unusual. Strange noises in the wall, and odd things happening to them convince them that something is living in the house with them that isn't normal. When Jared discovers a hand made field guide to fairies, things start coming together. But the family's danger increases, too. Goblins, including the sinister Mulgorath would do anything to get their hands on the book, including killing those who have it so that they can take over the world. Will Jared and his siblings be able to fight the goblins off with the help of other magical creatures? Read the books and find out!