The often-forgotten co-discoverer of the theory of evolution, Alfred Russel Wallace actually came upon the theory independently of Darwin. His later scientific leanings, however, led to him becoming forgotten within his own lifetime as Darwin's legend took over.
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Dawkins has been at the forefront of science writers for over 30 years, and continues to challenge, puzzle and antagonize both scientists and lay readers. His style is brisk and entertaining, yet he can describe difficult biological concepts in easy to understand prose.

Species is really an artificial construct - for most large animals, it's easy, say, to tell lions from tigers. but yaks and cattle interbreed and their offspring are backcrossed leading to many intermediate forms. Thus you'll never 'see' a species jump out of nothing. it's only after the 2 populations have changed enough that you can declare there's a new species