They're the main two publications for the "Moderný Pračlovek" sequence (Contemporary Caveman). The primary concept was to stand for caveman drawings within a very simple way and products that were utilized at that time... but will also inside our times. The main one — “Kuchyňa Pračloveka” (Caveman's Kitchen) — is https://maplepublishers.com/blog/4-ideas-to-find-the-best-self-publishing-agencies/