In the company of thieves
(Book)

The Company, a powerful corporate entity in the twenty-fourth century, has discovered a nearly foolproof recipe for success: immortal employees and time travel. They specialize in retrieving extraordinary treasures out of the past, gathered by cybernetically-enhanced workers who pass as ordinary people. Or at least they try to pass ... There is one rule at Dr. Zeus Incorporated that must not be broken: recorded history cannot be changed. But avoiding the attention of mortals while stealing from them? It's definitely not in the Company manual. History awaits, though not quite the one you remember.