This book, for the first time, makes available a body of my work that has long remained inaccessible and largely unknown to American readers: the thirty-seven bimonthly columns that I contributed to the British science fiction magazine "Interzone" from 1998 to 2004. For while it has long been respected as the best (and at times, the only) British science fiction magazine, Interzone has historically attracted few American subscribers, and it is never found in the university libraries or library databases that include most of my other publications. Only five of these columns may be familiar to American readers: the third column was extensively reworked to serve as a chapter in Hugo Gernsback and the Century of Science Fiction (2007), though it appears here in its original form; I posted three columns to my World of Westfahl website; and the piece that was submitted to become my thirty-eight column, included here in its original form, was revised to appear as a commentary for the website Locus Online. The other thirty-three columns are being republished for the first time, and as a bonus for those few readers who have read all of my columns, the book concludes with a brand-new, thirty-ninth column, never published before.