He is now a big enough name that recommendations from him show up on the covers of other writers' novels, and other writers do Shout Outs to him.
You should read his stuff. Yes, that means you.
Tropes:
Action Girl: Extremely prevalent throughout his work, it'd probably be easier to list the non-action girls. Fine examples include:
Karin Murphy from The Dresden Files, an otherwise normal human woman that's helped take on vampires, werewolves and fairy queens.
Kitai from Codex Alera.
The Cinder Spires gives us
Gwendolyn Lancaster and
Bridget Tagwynn.
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