by Jack McDevitt (2005)
In the far future when space travel is comm0nplace, antiquities dealers Alex and Chase find/sell artifacts, come across a cup from Seeker, a huge spaceship that left Earth 9,000 yrs earlier. They find the ship after a lot of work, but it raises more questions, and someone keeps trying to kill Alex and Chase .
Jo Walton
In an alternate reality in which a group of English nobles overthrew Winston Churchill and made peace with Adolf Hitler in 1941, a murder is committed at the home of Lord and Lady Eversley, and suspicion falls on David Kahn, the Jewish husband of Lucy Eversley.
Nisi Shawl
An "alternate history novel that explores the question of what might have come of Belgium's ... colonization of the Congo if the native populations had learned about steam technology a bit earlier"--Amazon.com.
Neil Gaiman
Doctor Who is a celebrated work by Neil Gaiman (Newbery, Carnegie, Hugo & Nebula Winner), recognized for masterclass storytelling and lasting literary resonance.
Michael Swanwick
World-renowned paleontologist Richard Leyster's universe changed forever the day a stranger named Griffin walked into his office with a remarkable job offer... and an ice cooler containing the head of a freshly killed Stegosaurus. For Leyster and a select group of scientific colleagues, an impossible fantasy has come true: the ability to study dinosaurs up close, in their own era and milieu. But tampering with time and paradox can have disastrous effects on the future and the past alike, breeding a violent new strain of fundamentalist terror - and, worse still, encouraging brilliant rebels like Dr. Gertrude Salley to toy with the working mechanisms of natural law, no matter what the consequences. And when they concern the largest, most savage creatures that ever walked the Earth, the consequences may be too horrifying to imagine.