Signed by hand by legendary comics artist Jose Luis Garcia Lopez and authenticated by CGC with a grade of 9.4. Features the 4th Superman/Flash race and a Professor Zoom cameo. With Signature Series books a certified CGC witness actually observes the signing of the comic so there is no possibility of the real autograph being switched out with another. As of this writing, there are only 21 SS copies of this book graded, ten grade higher with two others at 9.4.