Having pre-made adventures are a great resource for GMs. If they want some nice ideas for games, or run out of time when prepping, they can be dropped in and you still have a great session. In this case, we're getting a trio of linked adventures for your Call of Cthulhu games. It's Hudson & Brand: Shadows of the Past, and it's up on Kickstarter now.
From the campaign:
Hudson & Brand: Shadows of the Past presents a trio of linked scenarios, set in Victorian London, where players of the Call of Cthulhu roleplaying game (published by Chaosium, Inc), must thwart an ancient cult that seeks vengeance against the Empire for its activities in Africa. While this anthology collection builds upon the setting established in Hudson & Brand: Inquiry Agents of the Obscure, it stands on its own and the first book is not needed for these scenarios to be enjoyed.
The 150-page, main book will contain three scenarios, scenario seeds based on the events and NPCs introduced in each scenario, and their impact on the historical record. All Maps, Handouts, and NPCs will be included in appendices in the book/PDF for easy reference and printing. Ten Pre-Generated Player Characters will also be included in an appendix.
Taking inspirational cues from Sherlock Holmes, Ripper Street, Auguste Dupin, The Suspicions of Mr. Whicher, and The Incendiary's Trail,the book takes a mature look at the horror of Mythos machinations and the many dark corners in the seat of empire.
Funds for this Kickstarter will go towards commissioning more art and the hiring of more writers and creatives of quality to expand the book. The funds will also go towards printing and distribution.
The campaign's about 3x its funding goal with still 29 days left to go.