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Here are a few popular science books:

  One Two Three . . . Infinity: Facts and Speculations of Science by George Gamow
  Infinity and the Mind: The Science and Philosophy of the Infinite by Rudy Rucker
  Yearning for the Impossible: The Surprising Truths of Mathematics by John Stillwell
  Roads to Infinity by John Stillwell

If you want actual textbooks then maybe pick up a set theory textbook like "Naive set theory" by Halmos.