3.5 stars. A pleasant story with an extremely likable heroine, Tin Cat is primarily let down by its novella length. Too much of the initial world-building felt like telling rather than showing (particularly with regard to the comic book store and Amber's place within the community she'd built). Amber's believability and strength, however, managed to shine through. Definitely worth picking up for those seeking a SFR novella with compelling leads and snappy dialogue.