On the opening day of Frankfurt Book Fair, five publishing professionals convened at the SPARKS stage in Halle 4.2 to talk about what it means to be a publisher now. Joining Ingenta CEO George Lossius were Victor Henning, the co-founder of Mendeley and VP Strategy for Elsevier, Mark Anderson, President,Schools & Higher Education at Pearson and Dan Franklin, Digital Publisher at Random House UK. The discussion was chaired by Karina Luke, Director of BIC.

Over an hour-long debate, the panel discussed issues as various as publisher business models, the 'tyranny' of the ISBN and why working with start-ups can be both a pain and a pleasure for publishers. To see how the debate unfolded on the day you can see the full Twitter stream below and read write-ups of the event in both The Bookseller and Publishers' Weekly.