The New York Times did a two-page spread on this. Here's some of it.
The Essential Colette
The author, considered by some to be the greatest French writer of her time, played with words and convention. Here’s where to start with her work.
By Sadie Stein
Colette was not merely the most famous writer of her day, but one of the most famous people, period. A demimondaine with a shocking reputation, by the time of her death, in 1954, Colette was an institution, the first French woman of letters ever honored with a state funeral.
Most famous book:
Gigi
Picaresque feminism:
The Vagabond
Short stories:
The Other Woman
Family dynamics and one of the greatest love letters ever written to a mother:
My Mother's House
Women aging:
Julie de Carneilhan
Cats:
The Cat
For the whole article:
https://www.nytimes.com/article/best-colette-books.html?searchResultPosition=1