The Lost Metal by Brandon Sandoner, is the final book in the Wax and Wayne series of Mistborn universe. While the city of Elendel and its outer limits braces for a conflict, Wax has more than enough to handle in the form of new and more sinister enemies, plotting and scheming all across the Roughs and beyond, uncovering the sinister machinations of the Crypt itself as well as the secrets of the said order of the Harmonium. Fast-paced, action-oriented and vividly developed, this is a perfectly fine high-fantasy climax.