Since the recent explosion of many hits in the young adult fiction world, several publishers with mainly adult or children's reading material have stepped into the YA genre. Chicago-based publishing house Albert Whitman and Company (most famous for the Boxcar Children series) has been printing children's lit since 1919. This was the first year the company launched a young adult line, "Albert Whitman Teen," which included only two titles: Michael Ford's The Poisoned House and Anna Perera's Guantanamo Boy. Coming Spring 2012 will be Anna Perera's The Glass Collector and Deborah Blumenthal's The Lifeguard. The company says their list of YA titles are "smart, fearless books that explore unchartered territory in the world around teens and in their inner lives as well."
Angry Robot Books, on the other hand, has been printing adult science fiction and fantasy books since 2009. They just announced that, come September 2012, the company will also launch a YA line called "Strange Chemistry," with the hopes to print one YA book a month from there on out.
Many publishing houses are embracing the young adult genre, and it looks like other companies will soon follow!