Marcella Ferreira was born in Rio de Janeiro and moved to England as a teen. When she was young, she wrote new dialogue for characters she met in books, just because. She also fell in love with cartoon characters. Now she's a children's book author and wrote Bear vs. Dragon and The Queen Next Door (available in the UK) among others. Marcella lives in England with her husband and two children. Mark Chambers is an author and illustrator of children's books. He studied illustration in college and has won awards and accolades for his work.

He is the illustrator of Bear vs. Dragon and Supermouse and the Volcano of Doom . Mark lives and works in the mountains of the French Pyrénées, high up in the clouds with his wife and their very bouncy dog.