Across the crust: Journey to the floating city

Deep inside the Earth there is a stunning secret. The year is 1856 and John McBrian, a Cambridge's student, is suddenly launched for a breathtaking journey. Pursued by ruthless enemies, he and his friends are forced to travel to a distant land, across the crust. He discovers that the planet is hollow and a floating city controls the center of the Earth. John becomes involved with gravity neutralizers, quantum brains and technological advances that are far beyond his ability to comprehend. But none of those things touched him so much as a blue-eyed girl called Briela.