Signed book: Security Is a Thumb and a Blanket. First edition, first printing. San Francisco: Determined Productions, Inc., 1963. Hardcover with dustjacket, 5.5 x 5.75. Signed in ballpoint on the front free end page “Charles M. Schulz,” Schulz adding a sketch of Charlie Brown. Wear and soiling to jacket, light toning and soiling to covers, and a touch of subtle soiling to interior, otherwise fine condition. RRAuction COA.