The Blind Smith - Shadow Guardians, #1

They are called the Shadow Guardians, and they are a force of nature, striking out in the name of justice. striking against those who transcend the limits of law and order. Alone, each member is a highly-skilled artisan and potent combatant. Together, they are all but unstoppable. But they didn't begin there. The man who would one day come to lead their ranks, J. J. Moore, was once a computer wunderkind, happy with the life afforded to a Silicon Valley Baron.
That life, however, had no defense against treachery from within. One moment, J. J. was riding high. He was very, very rich and very much in love. He lost his fortune, the object of his affection, and his sight at the same time. But he didn't die. And a bunch of people are going to wish he had.