Jack the Ripper: Book Recommendations?

I am looking to get my hands on the "best" Jack the Ripper (JTR) books out there. By "best" I mean the ones that are the most accurate and reasonable about what we know and don't know about JTR.



Any recommendations?



Also, does anyone know of the "best" documentary on Jack the Ripper? Or documentaries? Your help would be greatly appreciated.