A precursor to gothic literature and science fiction genres, Frankenstein is a novel fuming with imagination as it depicts a well known horror story. Shelly's gothic fiction is written in epistolary form as a means of correspondence between the failed writer Robert Walton and his sister, while he is away on a dangerous expedition in search of fame. Some major themes explored in the gothic classic are the fallibility of ambition and knowledge, revenge, prejudice, isolation, and the imperfections of society.