You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Was it author Dean Koontz or author Kurt Vonnegut who used pen names early in their career?" whose answer is Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Leigh Nichols", and "Brian Coffey"..
Each document should contain about 30 words, and these documents should contain useful information.

Query: Dean Koontz pen name early career Kurt Vonnegut pen name early career
Useful Output:

Doc 1: Then there are Harlan Coben, the early James Patterson, Stephen King, and Dean Koontz. I also like the combination of mystery and
Doc 2: The Eyes of Darkness by Leigh Nichols (D. Koontz pen name) published by Piatkus 1981 1st Edition. LunaBooksandVinyl. Star Seller.
Doc 3: Koontz wrote under a number of pen names earlier in his career, including "David Axton", "Deanna Dwyer", "K.R. Dwyer", "Leigh Nichols" and "Brian Coffey". He
Doc 4: Dean Koontz is an interesting character and long time author. He began writing under various pen names early in his career such as Aaron Wolfe,
Doc 5: Because of being so prolific and admitting that he uses at least ten different pen names, Koontz has come under fire for his authorship multiple times. He