Gavin Lees has written a fantastic review of Louis - Night Salad in The Comics Journal. Here's a short extract, from the beginning and from the end of the review:
In the hands of Franco-Scottish duo Metaphrog (aka John Chalmers and Sandra Marrs — reductively, he writes and she draws, but the collaboration is much tighter than that), the children’s adventure-strip becomes an altogether more adult experience. They sublimate Pynchonesque paranoia and hallucinatory symbolism into the bright, primary-colored world of Louis: a cute, blank-featured everyman...
That Louis’s concerns are universal and his adventures a reflection of modern world make his tales like contemporary fables. Metaphrog manage to bridge the gap between innocence and experience with real insight, making Night Salad something that can stand alongside Kafka’s short stories — deceptively simple tales that manage to pierce directly to the heart of the human condition.
You can read the full review here.