These are typically the first two publications to the "Moderný Pračlovek" series (Modern day Caveman). The primary strategy was to signify caveman drawings inside of a very simple way and items that were being used at that time... but also in our times. The main one — “Kuchyňa Pračloveka” (Caveman's https://maplepublishers.com/blog/why-opt-for-self-publishing-is-it-only-for-creative-independence-or-something-more/