The Time Machine and The Invisible Man - H.G. Wells

The Time Machine, H. G. Wells's first novel, is a tale of Darwinian evolution taken to its extreme. Its hero, a young scientist, travels 800,000 years into the future and discovers a dying earth populated by two strange humanoid species: the brutal Morlocks and the gentle but nearly helpless Eloi.The Invisible Man mixes chilling terror, suspense, and acute psychological understanding into a tale of an equally adventurous scientist who discovers the formula for invisibility--a secret that drives him mad.