Sorcerer Rising by E. Nathan Sisk

You go and burn down one little world and everyone gets upset.

Once Virgil McDane was a powerful Wizard, an explorer, scholar, and soldier. One mistake later, he’s cast from the Guild, stripped of his magic, and locked out of his own mind, struggling just to pay his rent. As a Sorcerer, a wild self-taught mage, he takes any job he can get, no matter the risk and no matter who’s asking.

Now, a unique event has provided Virgil the opportunity to change all that. Cyrus Aberland, the millionaire inventor, is funding an expedition that will take Virgil across the world.