These are definitely the first two publications with the "Fashionableý Pračlovek" sequence (Modern day Caveman). The main idea was to stand for caveman drawings within a quite simple way and products that ended up applied At the moment... but will also in our days. The very first just one — https://maplepublishers.com/blog/what-support-you-can-avail-of-from-maple-publishing-when-self-publishing-a-book/