While attending a strict academy for potential princesses with the other girls from her mountain village, fourteen-year-old Miri discovers unexpected talents and connections to her homeland.

"Who says princesses don't wear black? When trouble raises its blue monster head, Princess Magnolia ditches her flouncy dresses and becomes the Princess in Black!" --

A sleepy Princess in Black takes a much-needed vacation and rides her bicycle to the seaside, where she plans to nap in a hammock, but her peace is disrupted by a roaring sea monster.

"Princess Magnolia is excited. Excited and nervous. She's going to the Interkingdom Science Fair today to present her poster about seeds and plants, and when she arrives, she sees that her friends are there too! Princess Honeysuckle made a mole habitat, Princess Sneezewort has built a blanket fort, and Tommy Wigtower has a talking volcano that's saying 'EAAAAT!' Wait, what? A surprise goo monster makes this a job for the Princess in Black, and the...

Young Razo travels from Bayern to Tira at war's end as part of a diplomatic corps, but mysterious events in the Tiran capital fuel simmering suspicions and anger, and Razo must spy out who is responsible before it is too late and he becomes trapped in an enemy land.

Noseholes and elephants! A pet-eating monster interrupts a perfect playdate with Princess Sneezewort . . . but who is that new masked avenger? Princess Magnolia and Princess Sneezewort have plans . . . mysterious plans, like a princess playdate! They dress-up slam! They karaoke jam! They playhouse romp and snack-time stomp! But then a shout from outside Princess Sneezewort's castle interrupts their fun. It's a monster trying to eat someone's kitty!...

Enna hopes that her new knowledge of how to wield fire will help protect her good friend Isi--the Princess Anidori--and all of Bayern against their enemies, but the need to burn is uncontrollable and puts Enna and her loved ones in grave danger.

"The Princess in Black is ready for her snowy playdate with the Goat Avenger and the Princess in Blankets. It's a perfect day to build snow monsters and battle them for practice. But just when they're about to wage battle, a huge foot smashes their snow monster. "SQUASHY!" It's a giant, and it's smashing everything in its path! The giant is too strong for the three friends, so the Princess in Blankets has an idea: it's time to light the Sparkle Signal...

When her beloved forest no longer gives her comfort and her brother Razo invites Rinna to the city to be one of Queen Ani's waiting women, she happily accepts, only to discover her own strength comes from places both expected and unexpected.

"The Princess in Black and her friends are enjoying a day of sun and sea on Princess Sneezewort's royal boat when a real, live mermaid princess emerges from the waves! Eeeeeee! Princess Posy needs their help protecting her very cute sea goats from being eaten by a very greedy kraken. But the princesses and the Goat Avenger quickly realize that fighting underwater can be tough for land dwellers, and only the mermaid Princess Posy can save the day....