Time Machine + Invisible Man by H.G. Wells

(used, very good condition, paperback)
 
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.
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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.