When his mother brings home a guinea pig instead of the dog he has always wanted, fifth-grader Rufus is not happy--until the rodent starts acting exactly like a dog.

"The laughs continue when Fido, the guinea pig that thinks she's a dog, has a pup that thinks she's a squirrel. A sequel to Guinea Dog"-- When his classmates learn about Fido, the guinea pig that acts like a dog, they all want a piece of Rufus, her owner. But Rufus hates the attention, and decides to make Fido learn how to be an actual guinea pig. But when she goes missing, he feels terrible. Was she lost, or did she run away, because he no longer...

"Nutmeg is celebrating her birthday with a very special picnic in the park. But when she starts to feel dizzy, the festivities have to stop. Luckily, Dr. KittyCat and Peanut are close at hand to help, so hopefully Nutmeg can have a happy birthday after all!" -- Back cover.

Harry feels ignored when his family pays attention to the neighbor's visiting guinea pig, but everything changes when the children bring both Harry and the guinea pig to school.

A young guinea pig describes situations that make her worry, what being worried feels like, and how she can stop worrying. Includes note to parents and teachers.

Wedgie and Gizmo's humans are taking their first family vacation--to a campground by a lake! And their pets are too destructive to stay home alone. Wedgie the corgi is super-excited. He can't wait to chase squirrels and poop in the woods! But Gizmo, the evil genius guinea pig, has no time for games. He must convince the forest critters to join his Evil Horde and help him take over the world--one tent at a time. Muh-hah-hah!--

A young guinea pig describes situations that make him miss his parents, how it feels to miss them, and what he can do to feel better.

"Class 5B has a substitute teacher-- and he's the worst! Fuzzy might just be 5B's pet guinea pig, but he will not stand by while his kids suffer. With the help of the Class Pets Club, Fuzzy is going to drive the terrible sub out of town ... or lose his whiskers trying!"--

Peanut just has their own unique way of doing things. Whether it's cartwheeling during basketball practice or cutting their own hair, this little guinea pig puts their own special twist on life. So when Peanut decides to be a rhythmic gymnast, they come up with a routine that they know is absolutely perfect, because it is absolutely, one hundred percent Peanut.

Lola brings the class guinea pig home for school vacation and when he escapes Charlie tries to help her find him before anything happens to him and before Lola has to go back to school.