Tackling the App Publishing Question

Quoting from the lead paragraph from Publishers Weekly's How Publishers Are Tackling the App Question:

Are apps marketing devices for authors and books, or a new revenue stream? This is just one of many questions publishers are asking as they develop apps from their content. When PW approached large and midsize publishers to find out about their app programs, we discovered that many houses don't have "programs" per se.

[JH]