The Diary of Wiska Wildflower: The Crystal Cave

Harriet Muncaster is the author and illustrator of the internationally bestselling Isadora Moon, Mirabelle and Emerald series of young reader books and the middle-grade Victoria Stitch series, both published by Oxford University Press. So far Isadora Moon is available in 42 different languages, including Spanish, Italian, Romanian and Korean, and is available as audiobooks. The Isadora Moon series won the El Corte Inglés Children's Book of the Year in 2019 and has sold over seven million copies worldwide. Harriet lives with her husband and daughter near some beautiful countryside in Bedfordshire, England.

Georgina Jane is an actor and voice over artist based in London. Georgina can be seen playing the lead in feature films Don’t Speak, Cupid and The Ghost Within. When Georgina isn’t busy in front of the camera she’s busy in the recording studio. She has narrated popular children’s books Fig Swims The World by Lou Abercrombie and The Bletchley Riddle by Ruta Sepetys and Steve Sheinkin.