Ex Machina Book Four by Brian K. Vaughan is a trade paperback published by DC Comics in 2014. This installment in the series features a cover artist by Tony Harris and showcases a mix of superheroes and science fiction genres. The story revolves around characters such as Mitchell Hundred, Amy Angiotti, and various other characters within the Ex Machina universe. With a modern age publication year of 2015, this book is a valuable addition to any comic book collection, offering a unique blend of storytelling and artwork.