These are generally the very first two publications to the "Modern dayý Pračlovek" collection (Modern day Caveman). The primary idea was to represent caveman drawings within a quite simple way and products which were applied at that time... and also in our days. The main a single — “Kuchyňa Pračloveka” https://maplepublishers.com/blog/how-to-start-your-career-as-a-self-publishing-author-with-maple-publishing/