This is probably my least favorite book in the series. Nothing much happens, and the stuff that happens is kind of ridiculous, even for a story predicated on ridiculous things. I mean, pirates, heroin, one-eyed Australians . . . I guess it could just be my own personal hang-ups, but it all feels kind of silly and inconsequential. And the title, Girl on Girl rubs me the wrong way, even if it is a double entendre (literally girls fighting girls, the pirates versus the Australian submarine chicks). Because we've also got 355 and Dr. Mann hooking up, and Yorick walking in on them. That moment plays with more significance on re-reads, more for what it says about Yorick than anything else, but it's kind of abrupt the first time through.
Girl on Girl also features a one shot called Boy Loses Girl, which finally gives us some backstory on Beth (the lost in Australia Beth, not the churchkeeper Beth). We see her fall in love with Yorick, and we see what's happened to her since the plague. The issue ends with Beth having a prophetic dream that convinces her Yorick is still alive.