Non-stop adventure that makes you think. Big tough guys with machine guns, beautiful women who more than hold their own. Evil enemies with complex backstories. And an irrepressible teenage girl to tie it all together. Mr. Correia has built a fascinating world, very like ours, but just different enough to make you say "wow" when you least expect it.
The title is accurate. What if magic suddenly appeared in the world, and it made hard logical sense? What would such a world look like? How would some people be different, and what adventures might they have?
When you finish, you'll be hungry for more. A good thing he wrote two sequels!
One more comment. Look out for the cameos. The book is filled with them, and they're wonderful.