Two hardcover books:The Survival of the Wisest, signed in black felt tip on the first free end page; and Man Unfolding, signed and inscribed in red ink on the first free end page, “For Roberta—with all good wishes for your own beautiful unfolding. Xmas 1975. Jonas Salk.” In overall very good to fine condition with a library stamping and a block of light uniform toning covering the signature in the first book, and a clipped price corner to the dustjacket of the second book. Both dustjackets also show scattered creasing, small tears, and wear. RRAuction COA.
