Peter Arrhenius is a screenwriter and an author located in Stockholm, Sweden. His first children's book - The Penguin Quartet - was released in 1996 and was the first collaboration of many with the illustrator - then girlfriend, now spouse - Ingela P Arrhenius. Together, they have published over 15 titles to date.

Besides writing books and screenplays for film and television, Peter enjoys playing guitar and making music with his band One Sad Horse and watching football from the comfort of his own couch.

Ingela P Arrhenius graduated from art school in the early 90s and has been working as an illustrator ever since. At first, she worked in advertising and magazines, but her focus over the past ten years has been on products and books.

Ingela has created patterns for fabrics, wallpaper and stationery, as well as packaging and home accessories. She has also collaborated with several toy producers around the world and her love of retro style, typography and colour is reflected in all her work. Ingela lives in Stockholm with her husband (an author) and two sons.