Signed book: The Challenge to Liberty. First edition. NY: Charles Scribner’s Sons, 1934. Hardcover, 5.75 x 8, 205 pages. Signed and inscribed in fountain pen on the front free end page, “To Mr. & Mrs. Charles Allen with the kind regards of Herbert Hoover.” Mild toning to interior, otherwise fine, clean condition. Auction LOA John Reznikoff/PSA/DNA and R&R COA.