They're The primary two publications with the "Contemporaryý Pračlovek" collection (Modern day Caveman). The main strategy was to depict caveman drawings inside of a very simple way and products that were used at that time... but additionally inside our times. The primary one particular — “Kuchyňa Pračloveka” (Caveman's Kitchen) — https://maplepublishers.com/blog/what-qualities-are-found-in-the-best-self-publishing-companies-uk/