The book - publishing arm of the magazine I worked for at the time offered me freelance work editing books. (editorialdepartment.com)
The newcomers will have no choice but to seek out content, establish their own publishing arms and aggressively court the next generation of authors. (publishingperspectives.com)
I had the same reaction, especially when it came to the part of their agency having the digital publishing arm. (madgeniusclub.com)