The main character of the novel “Marek and Tylza” Marek Hapaliuk is trying to warn humanity that their attempts to find aliens and establish contact with them can turn into a real tragedy. After all, he knows firsthand who they really are, and he also knows that the real owners of the Earth are already approaching and can claim their rights at any moment - and then all of humanity will be one step away from the dangerous line. Marek decides to repel them and even comes into contact with their scouts, but will he be able to prevent the tragedy and save the Earth? “Marek and Tylza” is a new action-packed novel by the talented science fiction writer Severin Podolsky, which will take its rightful place in the library of any fan of the science fiction genre.