Sam Hay 
Gasp of the Ghoulish Guinea Pig 

Joe is just an ordinary boy until he makes a wish on a spooky Egyptian amulet… Now he’s the Protector of Undead pets! This is the seventh book in the spooky but sweet series, telling the story of Flash, a guinea pig who needs Joe’s help to save his litter mates from an escaped snake. The books in the Undead Pets series are full of animal zombies and pets with one last thing to do before they pass to the other side! Funny and full of adventure, this series is ideal for boys and girls seeking a fast-paced and amusing chapter book.