This book was a readable, convincing argument for Percy Bysshe Shelley's authorship of Frankenstein. De Hart uses Shelley's writing habits, life experiences, and belief systems to create evidence for this conflict with history's acceptance of Mary as the author. If you love Frankenstein or Shelley, the book warrants a thorough reading.
However, I never much cared for Frankenstein and often found it suspicious that a 19-year-old girl in the presence of already great writers would have dreamed up a tale of early science and human nature on her own. And while I don't mind Shelley, neither do I adore him. So I admit to skipping through some sections that I felt were heavy handed. However, the first chapter had me convinced of Percy Shelley's authorship without much effort. The evidence seems clear, and any contradiction would, at this point, seem to be an unfair twisting of the facts.
De Hart makes it clear that he understands why scholars cling to the idea of Mary Shelley's authorship and how it can be dangerous to try to wrench female authorship from one of the cannon's great books. But neither does it do the legacy of women writers any good to credit work to them which isn't their own. To be clear, this book wasn't intended to restore authorship to Percy Bysshe Shelley as an act of justice; rather, it meant to delve more deeply into the psychology behind Frankenstein and reveal more about two of literature's most famous figures. This work creates a stronger understanding of the events that led to the writing of the famous Gothic novel, how Mary Shelley was an accomplice in her husband's scheme, and why it is important that we understand why the book was written at all.