Here is the Amazon description of This Paper World:
Jim Hunt is an average 18 year old college student... or he would like
to be. He dreams of a door. An important secret about who or what he
is lies behind that door; a secret he doesn't want to let out. During a
trip home for Christmas break, he is confronted by his destiny, but
will he follow the path that his old teacher Park would like him to? Or will he walk away to live a normal life?
Described as Stephen King meets X-men or Star Wars meets Jason Bourne,
this eBook will appeal to fans of Stephen King, Dean Koontz, Anne
Rice, Scott Sigler, Mark Yoshimoto Nemcoff, Harry Potter or the
I definitely second the recommendation on JC Hutchins. Hutchins is best known for the 7th Son series...or perhaps its a trilogy I don't recall. But my personal favorite is Personal Effects: Dark Art. That one was very fun and I enjoyed it a lot.
Crichton is also a great suggestion if you like the scientific aspects of Sigler's novels. He is most known for Jurassic Park of course. But my personal favorites of his are Prey, Next, and The Andromeda Strain.
While I wouldn't make a direct comparison to being similar to Sigler, in some aspects the story reminded me a bit of the same style as Infected, Stuart MacBride. I believe he has a few works out there but the only one I have read was HalfHead, and I really loved it.
I enjoy Nathan Lowell's Trader's Tales. He is also a gentleman.
I also like Paul E. Cooley. Tattoo is frickin awesome.
Tee Morris is awesome. Morevi, and Billy Baddings are great.
Also look to PG Holyfield.
I also like Basil Sands.
I hope the FDO can forgive the recommending of other works besides his.