Question: Who is the author of the book that has a musical adaption in which "Over the Rainbow" series in the United Kingdom was auditioning aspiring musical theatre performers for a role?
Sentence (from "Over the Rainbow (Canadian TV series)"): Based on the 2010 series "Over the Rainbow" in the United Kingdom, the series auditioned aspiring musical theatre performers for the role of Dorothy for a Toronto production of Andrew Lloyd Webber's stage musical adaptation of "The Wizard of Oz".
Relevant evidence: Yes