This somehow makes me want to reread Gaiman's Don't Panic, from back in his journalism days.

Arthur Conan Doyle -> Arthur Conan Doyle.
Daniel Defoe ->Daniel Defoe.
So far so good. But then...

Lewis Carroll -> Arthur Conan Doyle.
Voltaire -> James Joyce.
Charlotte Bronte -> Kurt Vonnegut.
Anne Bronte -> Jonathan Swift.
Emily Bronte -> James Joyce.
L M Montgomery -> Stephen King.
E Nesbit -> Agatha Christie.

To some extent, so is Joyce. ;-)

I think I'd quite like to read Anne of Green Gables re-written by King. Matthew and Marilla probably hide some deep dark secrets...

On different bits of my own writing, I got Kurt Vonnegut, JK Rowling, HP Lovecraft, Stephen King, James Joyce, and Bram Stoker: the James Joyce label seemed to be triggered by having a mention of Dublin in the text.

I heard some suspicion that it's based on word frequency, which would explain the E. Nesbitt to Agatha Christie result below (given that while one takes it in magical directions and the other to murderous ones, they're both set in similar worlds).

I was very pleased to find that when I pasted in my pastiches of Jane Austen, Arthur Conan Doyle and Raymond Chandler, it came back with all three. However, it mostly thought I wrote like Dan Brown when I was just being myself.