Freer (The Forlorn, 1999) and Flint (1632, 2000) join to describe what happens when a small alien probe called a Krim travels 2740 light-years through a wormhole and lands in the Regenstein Library of the University of Chicago. Then the expanding five-sided black pyramid casts some scientists and others back into Ancient Greece. Many mysteries surrounding this alien interstellar probe remain at novel’s end, so a sequel should be cooking. Swift and engrossing fun, the unresolved philosophical mystery smacking of Stanislaw Lem.