This table shows cumulative bestseller rankings compiled from Locus Online's weekly tables of SF, fantasy, and horror titles that appear on general bestseller lists published by The New York Times, Washington Post, San Francisco Chronicle, USA Today, Publishers Weekly, Amazon.com, Amazon UK, and Amazon Canada.

The summary here lists hardcovers, trade paperbacks, and mass-market paperbacks in descending order by a cumulative score calculated from the rankings of titles on each list.

(Details: a #1 rank is worth 1000 points, a #10 rank from a source that compiles separate lists for fiction/nonfiction and by format (i.e., not including Amazon or USA Today) is worth 775 points, with a #50 ranking on an Amazon or USA Today list (which combine all forms and formats into a single list) scaled to be approximately equal; then lower ranks on New York Times, USA Today, and Amazon lists are scored linearly down to 0. Despite this attempt to combine rankings from different sources in a relative way, the final results (arranged by 'Cum Score') are little different than a simple ranking based on the total number of times a title appears on any of the lists ('Times on Lists') would be.)

The ranking here shows cumulative scores by title and format, disregarding publisher and country of publication; thus all hardcover editions of Harry Potter and the Deathly Hallows, for instance, are summed together, whether published in the US, the UK, or Canada. Links on titles are to the US publisher where available; links to UK and Canadian editions are placed on the publisher names.