One year has passed since Phoebe skipped a rock across a pond, accidentally hit a unicorn in the face, and was granted a single wishwhich 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 withsomeone 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 playor 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.