Book blog readership has grown exponentially and a new study says that so has the influence of blogs on book sales. The study, conducted by Jupiter Research and BuzzLogic, found that blogs “have more impact on purchase decisions than social networks,” and that “Blogs create a conversation and trusted resource that influences purchase decision.” According to a report on ClickZ, “The survey also finds consumers are influenced by blogs at the moment of purchase decision … likely because bloggers establish themselves as an authority on a topic, particularly in niche areas, and create a relationship with the consumer.”