The book includes 32 stories, all first published in 2009. The book also includes a summation by Dozois, a brief introduction to each story by Dozois and a referenced list of honorable mentions for the year. The stories are as follows:^[2]

• Robert Charles Wilson: "Utriusque Cosmi"
• Steven Gould: "A Story, With Beans"
• Karl Bunker: "Under The Shouting Sky"
• John Kessel: "Events Preceding the Helvetican Revolution"
• Maureen F. McHugh: "Useless Things"
• Bruce Sterling: "Black Swan"
• Paul McAuley: "Crimes and Glory"
• Alexander Irvine: "Seventh Fall"
• Dominic Green: "Butterfly Bomb"
• Vandana Singh: "Infinites"
• John Barnes: "Things Undone"
• Jay Lake: "On The Human Plan"
• Peter Watts: "The Island"
• Lavie Tidhar: "The Integrity of the Chain"
• Mary Rosenblum: "Lion Walk"
• Jo Walton: "Escape to Other Worlds with Science Fiction"
• Rand B. Lee: "Three Leaves of Aloe"
• Elizabeth Bear & Sarah Monette: "Mongoose"
• Albert E. Cowdrey: "Paradiso Lost"
• Nicola Griffith: "It Takes Two"
• Geoff Ryman: "Blocked"
• James Van Pelt: "Solace"
• Nancy Kress: "Act One"
• John C. Wright: "Twilight of the Gods"
• Ted Kosmatka & Michael Poore: "Blood Dauber"
• Damien Broderick: "This Wind Blowing, And This Tide"
• Adam Roberts: "Hair"
• Robert Reed: "Before My Last Breath"
• Paul Cornell: "One of Our Bastards Is Missing"
• Chris Roberson: "Edison's Frankenstein"
• Ian Creasey: "Erosion"
• Ian McDonald: "Vishnu at the Cat Circus"

• 2010, United States, St. Martin's Press ISBN 978-0-312-60897-2, Pub date July 2010, Hardcover ^[3]
• 2010, United States, St. Martin's Griffin ISBN 978-0-312-60898-9, Pub date July 2010, Trade paperback ^[4]

• The Year's Best Science Fiction: Twenty-Seventh Annual Collection title listing at the Internet Speculative Fiction Database
• Review at Wall Street Journal