This classic science fiction novel, written as an unauthorized sequel to The War of the Worlds , follows inventor Thomas Edison and a team of Earth's finest scientists as they journey to Mars to retaliate against the Martians who previously invaded Earth. Packed with imaginative technology, including spaceships and disintegration rays, the novel is an early example of space opera. Garrett P. Serviss blends adventure, science, and speculative fiction in this bold tale of interplanetary conquest.