Top 10 Famous Contemporary Authors List

The world is home to many famous authors. The trouble is: How to set the selection criteria for such an ineffable and unquantifiable thing as the contemporary literature itself ?
Furthermore, the various sources for reliable all-time-best-most-top and similar lists (such as Amazon, Publishers Weekly, BookSense, Nielsen BookScan, and various newspapers) tends to list references by books rather than authors, and all have different methods for tabulating their lists.
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