The newest 5Evo book it focuses on 1888 London and Jack the Ripper's reign of terror. It's presented as an easy addon to D&D 5e and you can mix and match it's content with the core books. Additionally, with a few of the pledged you can snag the previous 5Evo books and add all of the craziness I mentioned above to your games.
Tunnel of Terror and Carbide City. I've not reviewed Mystery in the Sahara, but I think I'll do that tomorrow. I can't wait to add Whitechapel to the mix. These are quality books and you should take a look at the project.