One year has passed since Phoebe skipped a rock across a pond, accidentally hit a unicorn in the face, and was granted a single wish-which she used to make the unicorn, Marigold Heavenly Nostrils, her obligational best friend. In some ways, not much has changed. At school Phoebe still clashes with her rival--and sometimes "frenemy"--he ever-taunting and imperious Dakota. Outside of school, she still fills her free time with extra-credit homework assignments, dramatic monologues about the injustices associated with school cliques, and imaginative conspiracy theories regarding global forces like the "powerful construction paper lobby. " But unlike before, Phoebe now has a best friend to share it with-someone to make her laugh and to listen to all her extravagant ideas. In this second volume of Heavenly Nostrils, titled, Unicorn on a Roll, the reader is invited on a journey into the lives of Phoebe and Marigold as they navigate the difficulties of grade school, celebrate the winter holidays, and explore their super hero/super villain personas together. Join in the fun, as Phoebe competes against Dakota for the leading role of "Lisa Ladybug" in their fourth-grade play-or as she struggles to "manage" the PR debacle related to her nose-picking-scandal. ("I will neither confirm nor deny the events surrounding Boogergate. ") Witness a band of unicorns staging an "intervention" and learn all the details of Marigold's secret crush on a mysterious creature she has never seen. Perhaps most important, watch as this surprising friendship between a charming, nine-year-old dreamer and a vain, mythical beast forever changes both of them for the better.