Two books: a collector's edition of Double Helix, leather-bound hardcover with slipcase, numbered 36/1962, published by the Easton Press in 2013, signed on the colophon in blue ink, "James D. Watson"; and a later printing of The Astonishing Hypothesis: The Scientific Search for the Soul, hardcover with dust jacket, published by Charles Scribner's Sons in 1994, signed on the title page in black ink, "Francis Crick." In overall fine condition.
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