Not a bad book, but...
The title of the book is extremely misleading. The book really has nothing to do with blacksmithing. Like... Less than ten pages? Very silly.
Other than that, the characters were... One dimensional, and boring, but I've seen worse. The world was confusing, and very poorly described. One place goes from a random small town with walls, to suddenly being the only farmland on the continent, and the only town left standing? With no explanation or anything. Just, one page was one way, and the next it was another. Also, you can say something, describe something, or have your characters think something, once, and readers will understand and remember it. You don't need to repeat it a dozen times.
On top of that, the authors grasp of how forging and metalwork happens, and functions, is extremely poor. Like they read the first paragraph on wikipedia and just ran with only that information.
Over all, I did manage to finish the book, but I have zero interest in reading the second or any further ones.