The title novella, "The Atheist in the Attic," appearing here in book form for the first time, is a suspenseful and vivid historical narrative, recreating the top-secret meeting between the mathematical genius Leibniz and the philosopher Spinoza caught between the horrors of the cannibalistic Dutch Rampjaar and the brilliant "big bang" of the Enlightenment. Plus: equal parts history, confession, complaint, gossip, and personal triumph, Delany's...