James Tynion IV is a comic book writer, best known for his work on the Batman franchise for DC Comics. James's comics career began with co-writing the backup stories on Scott Snyder and Greg Capullo's character-defining run on Batman, which would lead to his making his own name on a number of Bat-centric series. This work would culminate in James serving as the "showrunner" of two consecutive weekly comic series, Batman Eternal and Batman & Robin Eternal. Recently, he has become the writer of the massive crossover project Batman/Teenage Mutant Ninja Turtles, bringing two of the most successful franchises together for the first time. The first issue was one of the bestselling comics issues of 2015.