They Are the primary two publications to the "Fashionableý Pračlovek" collection (Modern Caveman). The primary thought was to depict caveman drawings inside a very simple way and products that were applied at that time... but also inside our days. The very first a single — “Kuchyňa Pračloveka” (Caveman's Kitchen) — https://maplepublishers.com/blog/ideas-to-create-hype-among-readers-about-your-new-book/