They're the very first two publications for the "Modern-dayý Pračlovek" collection (Modern-day Caveman). The most crucial idea was to depict caveman drawings in a very quite simple way and items that were being made use of at that time... but in addition in our days. The very first 1 — https://maplepublishers.com/blog/what-are-the-areas-to-focus-on-when-you-self-publish-a-book/