James R. Gracen
Completely separate cases. No connection to any of the first. You could buy this box and play cases 5-10 first without having played any of the original 10 no problem.
I still recommend however not playing the 4 Jack cases as your first SH:CD experience.
Yes. Buy this. Then play cases 5-10 first. Then you can tackle the Jack the Ripper cases 1-4. Then you'll probably want more, so check out the free fan-made cases here in the SH:CD-Thames Murders files section, and get The Thames Murders.