| | HARDCOVERS |
Months on list |
Last month |
| 1) | Harry Potter and the Half-Blood Prince, J. K. Rowling (Scholastic/Levine) | 1 | - |
| 2) | Olympos, Dan Simmons (HarperCollins/Eos) | 1 | - |
| 3) | Magic Street, Orson Scott Card (Ballantine Del Rey) | 1 | - |
| 4) | The Hallowed Hunt, Lois McMaster Bujold (HarperCollins/Eos) | 3 | 1 |
| 5) | Academ's Fury, Jim Butcher (Ace) | 1 | - |
| 6) | The Ultimate Hitchhiker's Guide, Douglas Adams (Random House) | 5 | 10 |
| 7) | Accelerando, Charles Stross (Ace) | 1 | - |
| 8) | The Traveler, John Twelve Hawks (Doubleday) | 1 | - |
| 9) | Undead and Unappreciated, MaryJanice Davidson (Berkley Sensation) | 1 | - |
| 10) | The Historian, Elizabeth Kostova (Little, Brown) | 1 | - |
| |
PAPERBACKS | | |
| 1) | Ilium, Dan Simmons (HarperTorch) | 1 | - |
| 2) | Every Which Way But Dead, Kim Harrison (HarperTorch) | 1 | - |
| 3) | A Hat Full of Sky, Terry Pratchett (HarperTrophy) | 2 | 6 |
| 4) | Furies of Calderon, Jim Butcher (Ace) | 1 | - |
| 5) | Scardown, Elizabeth Bear (Bantam Spectra) | 1 | - |
| 6) | Iron Sunrise, Charles Stross (Ace) | 1 | - |
| 7) | New Spring, Robert Jordan (Tor) | 2 | 3 |
| 8) | The Treasured One, David Eddings & Leigh Eddings (Warner Aspect) | 1 | - |
| 9) | A Brother's Price, Wen Spencer (Penguin/Roc) | 1 | - |
| 10) | Forge of Heaven, C. J. Cherryh (HarperCollins/Eos) | 1 | - |
| |
TRADE PAPERBACKS | | |
| 1) | The Confusion, Neal Stephenson (HarperCollins/Perennial) | 2 | 1 |
| 2) | The Year's Best Science Fiction: Twenty-second Annual Collection, Gardner Dozois, ed. (St. Martin's Griffin) | 1 | - |
| 3) | Carpe Demon, Julie Kenner (Berkley) | 1 | - |
| 4) | The War of the Worlds, H. G. Wells (Penguin Classics) | 1 | - |
| 5) | The Chronicles of Narnia, C. S. Lewis (HarperTrophy) | 4 | 4 |
| |
MEDIA-RELATED | | |
| 1) | Star Wars: Dark Nest, Book 1: The Joiner King, Troy Denning (Del Rey) | 1 | - |
| 2) | Star Trek Voyager: String Theory, Book I: Cohesion, Jeffrey Lang (Pocket) | 1 | - |
| 3) | Star Wars, Episode III - Revenge of the Sith, Matthew Stover (Del Rey) | 4 | 1 |
| 4) | The Visual Dictionary of Star Wars, Episode III - Revenge of the Sith, James Luceno, et al (DK Children) | 4 | 5 |
| 5) | Batman Begins, Dennis O'Neil (Del Rey) | 1 | - |
| *) | Star Trek Vanguard: Harbinger, David Mack (Pocket) | 1 | - |
| |
GAMING-RELATED | | |
| 1) | DragonLance: Amber and Ashes, Margaret Weis (Wizards of the Coast) | 1 | - |
| 2) | Warhammer 40,000: Fifteen Hours, Mitchel Scanlon (Black Library) | 1 | - |
| 3) | Forgotten Realms: Elminster's Daughter, Ed Greenwood (Wizards of the Coast) | 2 | 1 |
| 4) | Forgotten Realms: Farthest Reach: The Last Mythal, Book II, Richard Baker (Wizards of the Coast) | 1 | - |
| 5) | Forgotten Realms: Legacy of the Drow Collector's Edition, R. A. Salvatore (Wizards of the Coast) | 1 | - |