The magazine's original publishing schedule, as reported on Sci Fi Wire on 29 September 2005, was to be quarterly, with columns updated monthly.

[4] IGMS featured original stories by such award-winning authors as Peter S. Beagle, David Farland, Tim Pratt, Eugie Foster, Bud Sparhawk, Mary Robinette Kowal, James Maxey, Mette Ivie Harrison, Sharon Shinn, Eric James Stone and Orson Scott Card.

In addition to short fiction, each issue was fully illustrated and includes audio content, and serialization of longer works by Card.

Other IGMS stories have been nominated for national awards and have been reprinted in various Year's Best anthologies, as well as appearing on the Locus (magazine) annual recommended reading list.

I Kindle Edition in 2012,[6] and a second anthology, IGMS: Big Book of SF Novelettes, published by Hatrack River as an e-book in 2013, with further reprints of stories that have appeared in the magazine.