Kill 6 Billion Demons, Vol. 1

The art starts strong and gets better and better. The author loves to fill giant tables with tons of tiny details... that often aren't random at all: sometimes you need to zoom and pan and just take it all in and marvel. And he knows how to surprise you with shifts in perspective and scale. It's 100% available for free online, but I find reading it on the web awkward: better a comic reader like Comixology (though the “guided reading” struggles a lot with the informal division of the page and reading flow the author uses in many tables.