Harriet Muncaster is the internationally bestselling author of the Isadora Moon series. She is also the creator of Mirabelle and Emerald, companion series to Isadora Moon, and stunning middle-grade trilogy Victoria Stitch. Harriet lives with her husband and daughter near some beautiful countryside in Bedfordshire, England. Harriet Muncaster is the internationally bestselling author of the Isadora Moon series. She is also the creator of Mirabelle and Emerald, companion series to Isadora Moon, and stunning middle-grade trilogy Victoria Stitch. Harriet lives with her husband and daughter near some beautiful countryside in Bedfordshire, England.