They're the primary two publications for the "Modern-dayý Pračlovek" series (Fashionable Caveman). The main thought was to depict caveman drawings inside a very simple way and products which ended up employed at that time... but in addition in our times. The very first just one — “Kuchyňa Pračloveka” (Caveman's Kitchen https://maplepublishers.com/blog/how-to-start-your-career-as-a-fiction-writer-by-self-publishing-a-book/