Justine Fontes was born in New York City. She grew up on Long Island and later graduated Phi Beta Kappa with a B.A. in English Liternature from New York Univeristy. Justine found her first job in publishing while she was a Freshman. She worked at various publishing houses before becoming a freelance writer. At Little Golden Books, Justine met her future husband, [Ron Fontes]. They started writing together and have written over 500 children's books. Justine and Ron moved to Maine in 1988.