After the publication of Scalzi's second book, Old Man's War, by Tor Books, a limited edition of Agent to the Stars was published in 2005 by Subterranean Press, with a cover by Mike Krahulik of Penny Arcade fame.
He also provided the illustrations for the cover of Agent to the Stars by John Scalzi.
In 2002 Khoo offered Jerry Holkins and Mike Krahulik of Penny Arcade a business plan and two months of work for free, with no strings attached.
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