ComiXology recently added the 2007-2011 Justice Society of America series to its store, including the collected editions previously published in hardcover and trade paperback. This is a great opportunity to check out a major run where Power Girl made her home for many years pre-New 52.
High quality images of all the covers have been added to the site cover gallery, as part of an overhaul of the galleries as I switch from NextGen Gallery to the FooGallery WordPress plugin. It’s pretty awesome.
The Power Girl: Power Trip is also available on ComiXology (it was released a week following the print release). For me, this is one where I prefer the print version for my shelf. Looks fantastic.