Complex sentence: In 2007, he realized the scope the internet had for development and subsequently joined aNobii as product manager, an online platform for book lovers acquired by a new venture backed by HMV Group, Harper Collins, Penguin and Random House.
Split into simpler sentences: In 2007, he realized the internet's scope for development and joined aNobii as product manager. It was an online platform for book lovers acquired by a new venture backed by HMV Group, Harper Collins, Penguin Books and Random House.