These are typically the initial two publications for the "Fashionableý Pračlovek" sequence (Present day Caveman). The main notion was to depict caveman drawings in the quite simple way and products which were used at that time... and also in our times. The 1st one particular — “Kuchyňa Pračloveka” (Caveman's Kitchen https://maplepublishers.com/blog/how-to-motivate-more-readers-to-buy-your-book/