"The Black Turtle: The Strange Story of Old Freak's Diamond" is an exciting novel by Danish author Christian Sparre. This book reveals the fascinating and mysterious story of the ancient Frick diamond, which is hidden in the intricate figure of a black turtle. The main character, who has lost everything and goes on a journey in search of a precious stone, finds himself in circumstances where reality and magic are at a tense intersection. It is here that the main idea of the work develops - the struggle with inner demons and the trials of fate. The interweaving of mysteries and adventures that fill the pages of this book fascinates and does not let you rest until the very end. Black Turtle is a work that will leave the reader enthralled from start to finish.