Attack Of The Graveyard Ghouls by R.L. Stine
They're baa-ack! Make way for the bestselling children's series of all time! With a fresh new look, GOOSEBUMPS is set to scare a whole new generation of kids. So reader beware--you're in for a scare! During a creepy field trip to the local cemetery, Spencer accidentally knocks over a headstone. Now he's face to face with the undead, a cold, ghastly ghoul who wants to take over his body! Can Spencer find his way out? Or will he be stuck in the graveyard...forever?