In 2000, he started the business Counter Editions with Matthew Slotover, publisher of Frieze magazine, (Slotover has since left) to sell prints online by artists such as Jake and Dinos Chapman, Emin and Rachel Whiteread.
Carl Sagan | Carl Jung | Carl Orff | Carl Maria von Weber | Carl Lewis | Carl Zeiss AG | Carl Linnaeus | Carl Sandburg | Carl XVI Gustaf of Sweden | Carl Levin | Carl Zeiss | Carl Michael Bellman | Carl Friedrich Gauss | Carl Froch | Carl Perkins | Carl von Clausewitz | Carl Reiner | Carl Hancock Rux | Carl Gustaf Emil Mannerheim | Carl Edwards | Carl Cox | Carl Bildt | Carl Barks | Carl Wilson | Carl Schmitt | Carl Milles | Carl Crawford | Carl Bernstein | Carl Andre | Carl Van Vechten |
Westfahl is a prominent science fiction critic along with Damien Broderick, John Clute, Thomas M. Disch, Carl Freedman, Stanislaw Lem, Eric Rabkin, Joanna Russ, and Brian Stableford.