I never watched any Nickelodeon shows, so was unfamiliar with McCurdy, but decided to pick this book up because I heard so many great things about it. And while it was very different from what I was expecting, I thought it was very good. 

It is a vulnerable account of McCurdy's relationship with her mother, acting, mental illness and manages to pair this, especially in the later chapters with levity and humour. Do check the content warnings for this one... 

The audiobook is particularly good too.