One of the best arguments that there is no God is exactly that beauty and complexity. It's only complex in a certain type of way, an evolutionary type of way.
No animal has jet boots, or fusion power, or laser beam eyes, or the billions of really useful, but impossible/really, really hard to evolve features. There's no design. There's no plan. There's only evolution baby!
You'll have to make do with some generalizations though, trying to go into the detail of every single thing is probably beyond what can be read in a single human's life time now.
Bill Bryson's A Short History of Nearly Everything is pretty good start, or Unweaving the Rainbow by Richard Dawkins, which is a book about how science makes nature even more beautiful by explaining it, not less.