Signed by Kerascoet on the title page! Rare thus! Out of print.

From the NPR review:

In 2014 this French team summoned the creepies with Beautiful Darkness, a ghoulishly comic tale in which tiny people lived on the decaying corpse of a small girl left in the woods. Like its predecessor, Satania seems to burst forth from an innocent, morally chaotic imagination. It's not actually a story about Hell, nor is it a fantasy -- or, not exactly. What it is, is thoroughly surprising.

From the publisher:

Charlotte--aka Charlie--a pretty redhead, sets up an expedition to find her brother. The young scientist, who disappeared underground several months ago, claimed, to everyone's astonishment, to be able to prove the existence of Hell by using Darwin's theory of evolution. The little group, led by Charlie, plunge underground in his pursuit. The deeper they progress into the entrails of our planet, the more they enter another world that hides other forms of life heretofore never experienced. The discovery changes them gradually in a way they cannot at first perceive…

A nom de plume for wife/husband team of comic artists Marie Pommepuy and Sébastien Cosset, Kerascoet are also artists in advertising, animation and fashion. They are famous for their work in the Dungeon series as well as Beauty, Beautiful Darkness and Miss Don't Touch Me. Fabien Vehlmann is a French comics scriptwriter whose many books include the Spirou series and Beautiful Darkness.