The Spiderwick Chronicles: The Completely Fantastical Edition by Tony Diterlizzi
After finding a mysterious, handmade field guide in the attic of the ramshackle old mansion they've just moved into, Jared, his twin brother Simon, and their older sister Mallory, discover that there's a magical and often capricious world existing parallel to our own - the world of faerie. Featuring all five books in the original Spiderwick Chronicles series, this edition also includes three recently unearthed bonus chapters; an exclusive making of section filled with early sketches of characters like the Grace kids, Thimbletack, and Hogsqueal; and, as a special added bonus, an all-star gallery where other popular artists put their spin on the characters and creatures in the world of Spiderwick.