In a book!?

From "The Ecco Anthology of Contemporary American Short Fiction."

In "Identity Club" by Richard Burgin

"... a junior executive at his agency who hadslowly introduced him to the club."

This is just a typo. The editors must have overlooked the missing space between the two words. Still, I was surprised to see it in a book, because mistakes there are rare. Usually, copy-editing is extensive before putting something in print so permanently.