Hickman tends to come up with something really cool and then make me think he forgot to develop it. This story is about humanity fighting a war across time itself against an unknown adversary. Pretty cool, huh? So how come the story is little more than a clever idea devoid of the details and development that would lead it to actually being more than just a clever idea? Then again, maybe it is me, as I never feel time travel is written in any way that I can accept as potentially believable.