These are generally the first two publications for the "Fashionableý Pračlovek" sequence (Present day Caveman). The main strategy was to stand for caveman drawings in a very simple way and products that have been applied at that time... and also within our days. The initial one particular — “Kuchyňa Pračloveka” https://maplepublishers.com/blog/ideas-to-promote-your-ebooks-after-self-publishing-london/