A Nebula-nominated classic by a Grandmaster of Science Fiction, Robert Silverberg, The Masks of Time tells the story of Vornan-19...a naked man who suddenly appears on the Spanish Stairs. *** Vornon-19 claims to have come from the far future and has access to technological marvels that support his claim. But is he really what he claims to be? *** Leo Garfield and his fellow scientists must unravel the truth about Vornon-19, but are they up to the job, or will they too fall under his magic-like spell, just like the rest of the world who is ready to worship a new kind of a messiah?

Up the Line is a ribald, Byzantine tale of time-tourism from multiple Nebula and Hugo Award-winning author Robert Silverberg. It's 2059 and Jud Elliott--former law clerk and failed Harvard history student--is at loose ends. Having left his previous job out of boredom, he finally takes a position as a Time Courier showing tourists around medieval and ancient Byzantium. Maybe that unfinished master's degree will come in handy after all ... Jud is careful and he (mostly) plays by the rules, not wanting to get on the wrong side of the Time Patrol. But, on one trip up the line, he meets and falls in love with his great-great-multi-great grandmother and suddenly the rules don't seem as important anymore ...