My Big Fat Zombie Goldfish

Used paperback. Great for ages 7-10. 

"My Big Fat Zombie Goldfish" by Mo O'Hara is a humorous chapter book series about a boy named Tom and his zombie goldfish, Frankie. Frankie becomes a zombie after Tom's "evil scientist" older brother, Mark, tries to kill him with toxic gunk. Tom and his friend Pradeep revive Frankie with a battery, turning him into a zombie with hypnotic powers. The series follows their adventures as they try to thwart Mark's evil plans, often involving Frankie's unique abilities.