Martin's back in two more stories. For their science fair project, Martin's team is going to help save the planet by organizing a beach walk. In the second story, Martin learns what it takes to score an A+ in teamwork and puts his knowledge of tools to good use as a volunteer at Bicycle Recycle.

"When Milton Worthy learns his classroom's pet ferret is the evil mastermind behind a dastardly plot for world domination, it's more than just about any kid could handle. But then not every kid is the son of a member of the super-secret, super-awesome Society of Substitutes! Now it's up to Milton and his substitute teacher mom to save Beacher Elementary School it's too late"--Dust jacket flap.

"Milton Worthy can't wait for his class trip to the city zoo. But little does he know that Noah the ferret--part time classroom pet, full-time evil mastermind--has escaped and stowed away on Milton's school bus. Good thing that their substitute teacher today is none other than Milton's mom, Mrs. Worthy, secret member of the super awesome Society of Substitutes! Will Milton and his super substitute mom be able to stop the zoo from running completely...