Nan Sweet has 3 audiobooks on Listento.it, narrated by 3 narrators. The most-rated is The Curse of the Invisibles.

Carrie is spending the summer with her new step-family. Although she's nervous about having a new little sister, Mrs. Huffity warns her that things aren't exactly as they seem. When Carrie stops a group of boys from teasing Shannon, she discovers that something is different about her step-sister. It will be more of a transition than Carrie ever expected. After all, her step-sister isn't human.
©2015 Nan Sweet, Jeanette Raleigh (P)2016 Nan Sweet, Jeanette Raleigh

Sixth grade can be tough, especially in Dusky Hollows. Carrie's magic ring wants to go to the new student, Everett. He's a wheelchair bound sixth-grader with cerebral palsy. But once he has the magic, everything falls apart. Carrie and Ivy get into trouble at school. Everett is kidnapped. And now Ivy and Carrie are in a race against time to save him.
©2015 Nan Sweet, Jeanette Raleigh (P)2016 Nan Sweet, Jeanette Raleigh

Mrs. Huffity's fifth grade class has a new project. It's a wish garden. Unfortunately, some of their wishes come true. Carrie, David, and Ivy accidentally travel to another world. To get home, they must save a prince from a curse and stop an evil sorceress. Along the way, they might even become friends.
©2014 Nan Sweet, Jeanette Raleigh (P)2016 Nan Sweet, Jeanette Raleigh