These are definitely the main two publications for the "Modern-dayý Pračlovek" sequence (Fashionable Caveman). The most crucial notion was to depict caveman drawings within a very simple way and products which had been applied at that time... but also inside our times. The very first just one — “Kuchyňa Pračloveka” https://maplepublishers.com/blog/author/maplepublishers/page/2/