"Devil's Crystals of Arret" is a science fiction novel by the writer Hal K. Wells, which transports the reader to an exciting world of adventure and mystery. The main character ends up on the planet Arret, where there are mysterious crystals, the equipment of which allows you to move in time and space. Having discovered this amazing world, the character must decide how to use the power of crystals and avoid the dangers that await him on this amazing planet. "Devil's Crystals of Arret" is a fascinating enterprise that will make the reader think about the nature of time, space and the limits of human imagination.