George R.R. Martin
Similar mystery authors: Laurie King (the Mary Russell historical mysteries), Jon Land (the Caitlin Strong mysteries), Janet Evanovich (the Stephanie Plum mysteries)
Similar YA authors: Veronica Roth (Divergent series), Tamora Pierce (The Song of the Lioness series), Ann Brashares (Sisterhood of the Travelling Pants series)
Mira Grant (Seanan McGuire)
Similar sci-fi authors: David Sosnowski (Rapture), Karen Lord (The Best of All Possible Worlds)
Now, tell us: who are some of your favorite authors of kick ass female characters? Share in the comments below!