"Friend, detective, expert" is an exciting book by Oleksandr Tsvetkov, which tells us about the exciting adventures of three extraordinary friends: Maxim, Mark and Artur. Maxim is a real criminal authority, who at a fairly young age has already managed to gain a lot of experience in the world of crime. Mark is a private detective who, thanks to his observation and ingenuity, is able to reveal any secret. Arthur is a brilliant expert in technical sciences who, thanks to his knowledge, is able to solve the most difficult puzzles. In the book "Friend, detective, expert", these three unusual characters join their efforts to solve a series of mysterious crimes that have become a real threat to the inhabitants of the city. Readers will immerse themselves in the world of intrigue, investigations and unexpected turns of events that will keep them in suspense until the last page. An exciting story about friendship, courage and mutual help, which will lead readers to the conclusion that together we are capable of achieving even in the most difficult situations. "A friend, a detective, an expert" is a book that will not leave indifferent any lover of the adventure genre."