Years after writing stories about a superheroine character she created with a best friend who died in a tragic car accident, sixteen-year-old May is shocked to see stickers, patches, and graffiti images of the superheroine appearing around Seattle.

"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....

Faith is not a regular teenager. She has flying superpowers. She's hoping she can get through her senior year in a normal way, but strange things start happening. Meanwhile, she hears rumored sightings of her ex, who was thought to have died months ago.

Dee, Terrence, and Hector come face to face with a very special guest on Author Visit Day, but there's something a little off about the world-famous writer. What evil designs does he have on his agenda? Then, the kids take a sigh of relief and are relaxing at summer camp. What evils could befall them there? Of course, there is the legendary swamp monster.