William Shunn's short story "Objective Impermeability in a Closed System" has been selected for inclusion in David Hartwell & Kathryn Cramer's Year's Best SF 13, to be published in May 2008 by Eos. The story was originally published in Shunn's chapbook An Alternate History of the 21st Century, still available from Spilt Milk Press for $5.00 (including US shipping). In his Locus review, critic Nick Gevers called this story "an intense evocation of the ethical and emotional dilemmas of a scientist of whom idealism is expected but for whom compromise is easier.... Shunn opts for an unusual, psychologically resonant conclusion, and a subtle questioning of the essentials of cause and effect. The implications run quite deep." Pre-order your copy of The Year's Best SF 13 now from Amazon.com.