Painter and, mainly, illustrator, he produces many book covers for the publishing houses Néo, Néo Plus, Gallimard/Folio, Presses de la Cité, Lattès, etc. Nicollet is also the illustrator of great classics of the fantastic literature (Les poèmes de Lovecraft) and of detective novels (Harry Dickson). Jean-Michel Nicollet is in fact a genuine graphic necromancer: he succeeds only too well in conjuring up the supernatural and in giving it a definite form.