I bought the latest collection and added it to the first four. I really like them all. Yes, it's a comic strip, but they deal with adult issues like how to love a hero, how to be a hero to the public and a good family man at the same time, how to deal with the setbacks life throws at you as it ignores your super-abilities, and how to love. If Lois&Clark were a comic strip, this could be them.
(Spoiler: There's an alt-Ultrawoman sighting in one of the earlier volumes!)
If you go the physical book route like I did, you might have to purchase one or more volumes from a used bookseller. I'm not sure the early volumes are still in print.
