May Bestsellers

Hardcovers
1. Brave New Words: The Oxford Dictionary of Science Fiction edited by Jeff Prucher
    tie
    Last Colony by John Scalzi
2. Ironside by Holly Black
3. City of Bones by Cassandra Clare
4. Reaper's Gale by Steven Erikson
5. Brasyl by Ian McDonald
6. Mathematicians in Love by Rudy Rucker
7. World War Z by Max Brooks
    tie
    Nobody's Princess by Esther Friesner
8. Wizards edited by Jack Dann and Gardner Dozois
9. Yiddish Policeman's Union by Michael Chabon
10. Rude Mechanicals by Kage Baker

Mass Market Paperbacks
1. The Ghost Brigades by John Scalzi
2. The City, Not Long After by Pat Murphy
3. Old Man's War by John Scalzi
4. Tithe by Holly Black
5. Bonehunters by Steven Erikson
6. Light by M. John Harrison
7. Altered Carbon by Richard Morgan
8. Pushing Ice by Alastair Reynolds
9. Helix by Eric Brown
    tie
    Swordspoint by Ellen Kushner
    tie
    Red Lightning by John Varley
10. Beguilment by Lois McMaster Bujold
    tie
    Undead and Unpopular by Mary Janice Davidson

Trade Paperbacks
1. Reaper's Gale by Steven Erikson
2. Overclocked by Cory Doctorow
3. James Tiptree Memorial Award Anthology vol. 3 edited by Karen Joy Fowler, Pat Murphy, Debbie Notkin and Jeffrey D. Smith
    tie
    Snake Agent by Liz Williams
4. Portable Childhoods by Ellen Klages
5. Down and Out in the Magic Kingdom by Cory Doctorow