The iPad and a more concerted effort from Google will cut the Amazon Kindle's share of the e-book field by two thirds, Credit Suisse analyst Spencer Wang said in a report issued Tuesday. He believes Apple's entry into the field has "stoked fears" about the growth of the Kindle and that this, combined with Google Books, will drop Amazon's e-book sales share from a near-monopoly 90 percent today to just 35 percent within five years.