The EU closes a four-year long investigation into Apple's rules for e-book and audiobook app developers after the complainant withdrew its complaint (Foo Yun Chee/Reuters)

Foo Yun Chee / Reuters:
The EU closes a four-year long investigation into Apple's rules for e-book and audiobook app developers after the complainant withdrew its complaint  —  EU antitrust regulators on Friday closed a four-year long investigation into Apple's (AAPL.O) rules for competing e-book and audiobook apps developers …