Louis is a graphic novel series created by metaphrog, the Franco-Scottish duo Sandra Marrs and John Chalmers.

[1] i-D described Louis - Red Letter Day thus: "With squibs for eyes and delicately inked circles for nose and mouth, Louis' reduced features magically express a life spent daydreaming, writing letters to possibly fictional aunts and reading signs that say 'you look like a potato'.

Infused with shadowless light and written in precisely elusive balloons Louis - Red Letter Day is a seriously spaced enigma from Metaphrog aka Glaswegian cult artists John Chalmers and Sandra Marrs.

Their fourth, Louis - Dreams Never Die, was released in 2004 in association with the UK based label Fat Cat Records.

For this, Hey (from Berlin) and múm (from Iceland) wrote two music tracks inspired by the Louis books, and metaphrog made a special short animation.