The Seeing Stone, Book #2 of The Spiderwick Chronicles By Tony DiTerlizzi and Holly Black

Mallory and Jake must rescue Simon from the goblins who snatched him in this repackage of the second book in the #1 New York Times bestselling Spiderwick Chronicles.

Thanks to the mysterious field guide left behind by their long-lost great-great-uncle Arthur Spiderwick, life for the Grace kidsJared, Simon, and Malloryis beyond weird. When Simon goes missing, Jared is convinced creatures from the faerie world have something to do with it. Mallory is not convinced. That is, until she and Jared have to contend with a band of menacing, marauding goblins. Simon is clearly in danger, and its up to Mallory and Simon to save him, before its too late