"Rena Visits the Mermaids" is an exciting adventure about a girl named Renata, who accidentally finds herself in the vortex of the mysterious sea world of mermaids. The underwater world, which turns out to be unexplored and magical for her, is extremely dangerous, but at the same time charming. Together with Renata, the reader travels between coral reefs, meets sea monsters and helps the main character cope with the difficulties of this unpredictable world. The book teaches us about the importance of friendship, mutual help and self-belief even in the most difficult situations. "Rena is visiting the mermaids" is a fabulous adventure story that will not leave indifferent anyone who is ready to experience the charm of the raging underwater world.