These are the main two publications to the "Moderný Pračlovek" sequence (Present day Caveman). The most crucial strategy was to represent caveman drawings in a quite simple way and items that were being applied at that time... but in addition within our times. The main just one — “Kuchyňa Pračloveka” https://maplepublishers.com/blog/top-features-of-the-best-self-publishing-companies-uk/