By Marcus Leach

Publishing giants Bloomsbury have reported a considerable increase in their e-book sales as popularity of electronic readers rose worldwide.

Pre-tax profits for the 14 months to the end of February this year were £4.2 million, with e-book sales finishing at £1.5 million, up from £79,000 the previous year.

Chief executive Nigel Newton said Bloomsbury were changing the face of the publishing industry.

"Demand for digital delivery, including e-books, is increasing significantly," Mr Newton said.

"It will change the publishing business model, creating one worldwide market," he added. "The publishing world is handling its own revolution."