Katrina has spent her life surrounded by books ever since her first visit to the library when she was tiny. She now lives in a house full of bookshelves fit to bursting, and continues to fill them with books that she has written.

She recently won Booktrust's Story Time prize for her and Nick Sharratt's picture book The Whales on the Bus.

When she's not writing for children, she is cuddled up with one of her fluffy cats and a good book, or plucking cat hairs off her clothes.

Guilherme lives in Blumenau, in southern Brazil. In 2010, he won a national contest for new children's book illustrators and has been working with editorial illustrations ever since. After illustrating many books for other authors, Guilherme started writing his own books in 2017. Guilherme's work has been published worldwide and has received various accolades, including the Jabuti Award and the Golden Pinwheel Grand Award. Guilherme continues to seek ways to entertain and delight children through his art and stories.