The Frankfurt Book Fair is conducting a survey of what the world’s publishers believe will be the business models of the future. The brief survey asks industry members what they think the main sources of revenue will be in the digital world. Results will be published in an upcoming issue of PW as well as in the October issue of the Frankfurt Book Fair newsletter. To take the survey, click here.

For more Frakfurt Book Fair 2009 coverage, from PW and BookBrunch, go here.