INTERQUEST Announces 2016 London Digital Book Printing Forum  Seventh Annual Event to Take Place June 28, 2016 at the Royal Institute of British Architects (RIBA) Annick Boizard INTERQUEST 434-979-9945 (Phone) 434-979-9959 (Fax) press@inter-quest.com Charlottesville, VA and London, U.K. (April 21, 2016) —INTERQUEST, a leading market and technology research and consulting firm serving the digital printing and publishing industry, today announced that the 2016 London Digital Book Printing Forum will be held Tuesday, June 28, 2016 at the Royal Institute of British Architects (RIBA), Portland Place,…