Amazon-owned Quidsi, which operates e-commerce properties including Diapers.com and Soap.com, has launched Familyhood Plus, a two-day shipping service similar to Amazon Prime. Membership is free for now, but the retailer is expected to start charging later. Since its launch, Amazon Prime has added membership perks including a free movie-streaming service and e-book borrowing.
Book sales increased 6.2% in 2012, and e-books were the fastest-growing category, according to a report from the Association of American Publishers. E-books made up 23% of sales, compared with 1% in 2008, according to data from almost 1,200 publishers.