The last generally acknowledged victim of Jack the Ripper was twenty five year old Irishwoman named Mary Jane Kelly. Or was she? So little is known of this young woman, so thoroughly has she evaded all attempts at researching her life that, in all truth, there is very little we can actually say we know about her. Whilst research has led to significant advances in other areas of the Whitechapel crimes, she remains an enigma. This book pulls together what we can learn and reasonably infer about this most elusive victim of the most elusive killer in criminal history.