That revolve around the military, cia, FBI, that revolve around the conflict in the middle east? I know about vince flynn, brad Thor, and Alex borenson. Are there any others? Even some non-fiction books about the same topic would be good. Are there similar books/writers to Dan Browns books too that I can look into? Im asking for a nook for the holiday and want to expand my reading.

What I've read:
Harry potter series
Dan Browns books
Some vince flynn, Alex borenson, and brad Thor.
Some Tom clancy.

Can you recommend similar books to what I've listed? Thanks!