Carmen Mateo was born in Seville (Spain) in 1982. She is a psychologist who uses children's literature as a tool with her patients and as a moment for family enjoyment. Although her professional career started in Psychology, she soon crossed paths with stories, as a fan and, later, as their author. She likes to talk and be talked to, and with Martín Parlanchín, a very chatty boy, she debuts in NubeOcho. 

Marisa Morea is a children’s books illustrator. After graduating in Creative Illustration at Eina School in Barcelona, Spain, in 2009, she returned to Madrid to work as an art director in various advertising agencies while receiving her first illustration commissions, including various international publishers. In 2013 she decided to quit advertising to fully dedicate herself to illustration. Since then she has worked with publishers such as Simon and Schuster, Nosy Crow, SM or Penguin Random House.