The explosive storyline from BATMAN #21-22 and THE FLASH #21-22 is collected in a new Deluxe Edition hardcover! The Dark Knight and the Fastest Man Alive, the two greatest detectives on any world, unite to explore the mystery behind a certain blood-stained smiley button embedded in the Batcave wall. What starts as a simple investigation turns deadly when the secrets of the button prove irresistible to an unwelcome third party - and it's not who anyone suspects! It's a mystery woven through time, and the ticking clock starts here!
- Series: Batman/The Flash
- Hardcover: 104 pages
- Publisher: DC Comics; Deluxe edition (October 17, 2017)
- Language: English
- ISBN-10: 140127644X
- ISBN-13: 978-1401276447
- Product Dimensions: 7.3 x 0.6 x 11.1 inches