They're the main two publications for that "Moderný Pračlovek" collection (Fashionable Caveman). The primary idea was to symbolize caveman drawings inside of a quite simple way and products which have been applied at that time... and also inside our days. The initial one — “Kuchyňa Pračloveka” (Caveman's Kitchen) — is https://maplepublishers.com/blog/how-to-start-your-career-as-a-self-publishing-author-with-maple-publishing/