STOCKHOLM, Aug 5 (Reuters) - Swedish audiobook streaming group Storytel on Friday reported second-quarter revenue ahead of analysts' expectations, helped by growth across the Nordics, Europe and the United States.

Quarterly net sales rose 28% to 781 million Swedish crowns ($77.16 million) from 611 million crowns a year earlier. Analysts had expected 774 million crowns, according to data from Refinitiv. ($1 = 10.1220 Swedish crowns) (Reporting by Supantha Mukherjee in Stockholm, editing by Terje Solsvik)