He uses every-day, adult language, the goal being to improve the reader's word recognition and vocabulary. An easy and convenient glossary is included where simple definitions appear just to the right of the new words.
Collaborators in Marceau's quest to "do good" include the animals, birds and all other living (or not) creatures, the clouds, the sun, the wind and anything else that his fertile mind can imagine.
And it is all in rhyme.
The good guys always win, the bad guys always lose, and nobody ever gets hurt.