In an antique-filled mansion, sisters Claire and Sophie find a ladder to the magical land of Arden, where wraiths roam freely, unicorns have disappeared, and the guilds of magic no longer trust each other.

Rainbow Tinseltail and the other students at Sparklegrove School for Unicorns are excited when a brand new unicorn, Sunny Huckleberry, enters the school.

Uni the unicorn believes that little girls are real.

Concerned about losing friends during the first week of school, Unicorn goes overboard while upgrading his fabulousness.

A child wishes for a unicorn without knowing how unruly they are as pets.

When Phoebe meets a unicorn named Marigold who grants her one wish, Phoebe wishes Marigold would become her best friend, and the two set off on adventures big and small.

Phoebe and her best friend, a unicorn named Marigold, navigate the difficulties of grade school, celebrate the winter holidays, and explore their superhero/villain personas together.

Begging his big sister to give him wish-granting powers for one whole day, Sparkleton the shaggy purple unicorn resolves to prove how glittertastic he will be when performing magic, before unleashing mayhem in the form of zany wishes and neglected homework.

In rhyming text, the story celebrates the positive, loving, and unique relationship between parent and child.

Bo Tinseltail and friends welcome a jackalope family to Sparklegrove Forest, and when they learn the family is being chased by centaurs everyone bands together to help the jackalopes live in peace.