This apparently acts as a prequel to an animated movie that I haven't seen. So I don't really know how it relates to that. But, as a stand-alone story it's not too bad. Not great and essential reading, but not bad.

It's kind of Elseworlds-like, but doesn't carry that official branding (DC's label for non-canonical, alternative version stories). You get a chapter each for the quick origins of Superman, Batman, and Wonder Woman; and then a few chapters on their combined story, narrated by a very skeptical Lois Lane.

It's definitely a darker version of each character, which is interesting, but explores a lot of the regular themes of "gods amongst men".