The Visitor Audiobook (Free)

Rachel is still reeling from the news that the Earth is secretly under assault by parasitic aliens known as the Yeerks. And that she and her friends — five kids who, purely by opportunity, stumbled onto a downed spacecraft and were given the energy to morph into any pet they contact — are the planet’s just defense. But Rachel’s been something of a daredevil. So when it’s recommended that they infiltrate the house of their helper principal, Mr. Chapman, who also happens to be a human being host from the Yeerks, she volunteers. But what she finds inside could be more than actually she are designed for.