The writer Ernest d'Hervilly, in the audiobook "Adventures of a Prehistoric Boy", invites us to visit the cozy cave of his protagonist. The hospitable Kreck will be glad to welcome guests, and finding him is not difficult. The cave is situated above a river, where clear water washes over a green hill. And so that future friends do not lose their way, a bright fire always burns in the depths of the cave. All that is needed for the journey is not to mistake the century and to beware of wild animals. And as soon as the travelers arrive at their destination, a fascinating story about the customs of primitive people and descriptions of picturesque nature awaits them.