About the book: 1965 / Batikawa Cave is not fiction, it is located in Mexico. Archaeologists discovered the site of an ancient man in it. Their discovery excited the scientific world. Three children, Lesha, Valka, and Pyatitonka, heard about the discovery on the radio. And then there was such a coincidence: in the forest, not far from my native village, there also turned out to be a cave with rock paintings, with the remains of a fire, with obvious traces of prehistoric people living in it. Well, just like Batikawa! At least send an urgent telegram to the Academy of Sciences. However, maybe it’s better to wait with the telegram, maybe figure it out yourself first? The ardent desire to serve science not only drew enterprising guys into a cycle of funny adventures. Carried away by “scientific research,” they learned a lot of new things..