"...Earlier this spring, the Book Industry Study Group, or BISG, published a study showing that the Amazon Kindle remained the most popular e-reading device among American readers. BISG put the Kindle market share at about 40 percent, with the Nook under 20 percent. Tablets gobble up most of the remainder, pushing Sony Readers off the chart altogether. In general, BISG predicted, all e-readers could soon be in trouble, as users shift to multi-use tablets instead of dedicated e-readers."

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