Nadia Higgins 
Zombie Next Door [PDF ebook] 
Zombie Zappers Book 3

Creepy is too close for comfort. Leo is convinced his next-door neighbor, Mr. Smith, is a zombie, but in Rotfield, things aren’t always what they seem. When a terrible incident happens to Mr. Smith, Leo realizes it’s his fault. He and Chad try their best to make things right, but something about Mr. Smith seems very wrong. The boys are sure he’s hiding something. Will they learn his deepest, darkest secret?