Khaled Hosseini's new novel, "And the Mountains Echoed," will be published by Riverhead Books on May 21, and The Wall Street Journal has an exclusive sneak peek at the book cover.

Hosseini is the author of the bestselling novels "The Kite Runner" and "A Thousand Splendid Suns," which combined have sold more than 38 million copies world-wide. "And the Mountains Echoed" is Hosseini's first book in six years.

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