When the Ghost Dog Howls (Goosebumps HorrorLand #13) - Goosebumps Horrorland

Twelve-year-olds Andy and Marnie had an awesome week in HorrorLand-despite their freaky encounter with Murder the Clown and the zombie mob. Then they think they've won big when they get a FREE souvenir from HorrorLand's Chiller House-and they're not so worried that the shopkeeper said they'd have to "pay later." Or that the hound's tooth is rumored to be haunted. It's totally worth the risk to have a tooth that grants wishes. But when Andy hears howling at night and Marnie starts acting strange, they begin to rethink the gift from HorrorLand.

Unlucky book #13 kicks off an entirely new type of terror that will keep you guessing and quaking until book #19.

Each eerie adventure of the next seven-book arc begins with a trip to the Chiller House, a gift shop only found in HorrorLand. Kids are invited to take a little horror home with them and given a souvenir and a miniature Horror. At home, the kids experience wild things with their "free" gift, while the glowing, menacing Horror keeps an eye on the fun. When it's time for their payment, the Horror takes them back to shopkeeper Jonathan Chiller.