They're the initial two publications for the "Modern-dayý Pračlovek" collection (Contemporary Caveman). The most crucial idea was to stand for caveman drawings in a very very simple way and products that were applied at that time... but additionally in our times. The primary just one — “Kuchyňa Pračloveka” (Caveman's Kitchen) https://maplepublishers.com/blog/top-features-of-the-best-self-publishing-companies-uk/