"Na podvode" is an exciting adventure book written by the famous Ukrainian writer Oleksandr Kopylenka. This novel tells the story of three saboteur friends who go on a dangerous mission underwater. The deep-sea expedition turns into a real test for each of them, where on the edge of life and death they must overcome their own fears and trials. Exciting moments of underwater adventures, nervous tension, danger and a sense of personal limitation - you will find all this in the pages of this book. "Na podvode" not only captivates with its dynamics of events, but also inspires thoughts about friendship, devotion and the importance of friendly support in the most difficult moments. This book will be an exciting read for fans of adventure literature who love tense plots and unpredictable turns of events. "Na podvode" is a book that will stay with you long after you close the last page.