Helen Perelman has worked in a children’s bookstore and was a children’s book editor. She now writes full-time in New York, where she lives with her husband and two daughters. Visit her online at HelenPerelman.com.

Olivia Chin Mueller grew up in Chester, Connecticut, and now lives in Los Angeles, California. She attended the Rhode Island School of Design and graduated with a BFA in 2014. Besides illustrating, Olivia loves playing with her cats, raising silk moths, and also enjoys sewing and felting plush animals of her own.

When Princess Mini, Taffy, and Prince Frosting hear scary noises, Mini worries that her sleepover at Candy Castle may be haunted.