Take a look at the PocketBook 602 / 902 as well. They can zoom for PDFs but PocketBook also has "Column Zoom" Which allows you to read each column sequentially zoomed to width . So It will start at the top of column one and when you get to the bottom of the column clicking the page turn moves to the top of column two. when you get to the bottom it will turn to next page etc. Extremely handy for multi column PDFs
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