An identical twin chronicles life with her much-different sister.In this Australian import and stand-alone second installment in the Totally Twins series, Persephone Pinchgut continues to write about her life as an identical twin. She begins by briefly recapping her home life, including living with a single mother and some of the differences between herself and her sister, Portia, such as how Portia is into "girly" things like fashion whereas she, Persephone, is into archaeology and other "sensible" things. Following this, the fifth grader focuses her narrative on Portia's interests and their effects. When Portia signs with a modeling agency, Persephone observes, in her breezy, conversational style, changes in her sister's personality and how she chooses popularity over their mutual friends. A fiasco with a kid celebrity, however, grounds Portia and leads to reconciliation with her true friends. The experiences pull Persephone into the drama in unexpected ways as well. In a parallel storyline, she also observes her mother's new dating life and how career choices impact this budding relationship. Interspersed lists and black-and-white spot art add to the levity. (In the latter, principal characters and most of the secondary cast present White.) Although the story doesn't cover new ground, Persephone's independent, arty mother, her nontraditional family, and her twin insight make it appealing, particularly for reluctant readers. A call from Persephone's travel-writing grandmother sets up the next volume.A light romp through twinship and friendship. (Fiction. 7-10)