If your a fan of graphic novels or comic books, Comic Time is a comic reader for your Windows Phone that is a attractive option to consider.
Comic Time supports CBR (rar) and CBZ (zip) files and has built in integration with your Skydrive to download your comics. You also have support for internet URL's to download your favorite comics.
Comic Time is nicely laid out with a Smart Mode display designed to deliver your comics to your Windows Phone screen one panel at a time. If comics are your game, Comic Time isn't a bad option to consider for your mobile reading needs.