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The Solo Investigator's Handbook
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The Solo Investigator's Handbook


5e Solo Gamebooks presents The Solo Investigator's Handbook, a 95-page supplement for Call of Cthulhu. This product is the result of months of work and extensive playtesting, and contains a full system for generating on-the-fly, immersive adventures for your investigator(s). Using paper, pen, dice, this system, and your fevered imagination, you can generate full scenarios for yourself without the need for a Keeper. This is great if you cannot find a group, or for creating little scenarios for yourself in between your regular group games. 

It can also serve as a great source of adventure generation/inspiration for Keepers (possibly as they adventure through the scenario themselves - creating as they go). Even if you are not interested in the concept of solo scenarios within Call of Cthulhu, take a quick look below at the Mythos-related resources that this supplement offers. 


  • 50 quest hooks to get your investigator started on their dark adventures.
  • 50 rumors that you may hear in the course of your travels.
  • 50 clues that you might stumble upon in the course of your investigations.
  • 50 random events to drop into any adventure.
  • Tables of randomly generated spooky effects that an investigator might experience. 
  • Tables for randomly generating NPCs.
  • NPC stat blocks for commonly encountered characters such as beat cops, cultists, high priests, thugs and more.
  • A handy reference table listing the main characteristics of every Mythos creature from the Keeper's Rulebook.
  • A system of location tables that will randomly generate locations as you travel through just about any environment - Arctic, Jungle, Urban, you name it. 
  • A full system for generating solo adventures for your investigator(s).
  • A question/answer mechanic designed to answer questions that will guide your quest.
  • An escalating mechanic (Mythos Points) that increases the intensity of the action over time.
  • A list of 499 random verbs that can provide direction/suggestion for any aspect of the quest. 
  • Examples of solo gameplay using this system, so you can see it in action.

The Solo Investigator's Handbook for Call of Cthulhu is a great tool for self-guided play. It's the perfect way to play when you're looking to build your knowledge of the game, or when your group is too busy to meet up.

William Paprocki, Geeks-a-go-go

It's a great practice in the creative spirit. You will descend either into madness or death and no-one will be there to help you.

Jay Traub

A fantastic tool to experience the horrors of the Lovecraftian universe. This book is tailored for anyone wanting to play Call of Cthulhu, for soloists and Keepers alike, to learn the rules as you play and give you an idea of how an actual game would go.

Vicknesh Suppramaniam

This system is designed to sit underneath the CoC rules, and players are encouraged to add their own tables and other additional material as they see fit. The key here is adaptability, and The Solo Investigator's Handbook is designed to be flexible in that regard. 

So, if you are just dying to go insane uncovering eldritch mysteries, then pick up the Handbook now and get investigating!

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Reviews (1)
Discussions (15)
Customer avatar
Luc L August 05, 2020 8:21 pm UTC
POD please
Customer avatar
Vladimir M July 09, 2020 5:56 pm UTC
Tienen planes pa una versión mayor o mas grande, mas es mejor
Customer avatar
Michael W June 11, 2020 2:10 pm UTC
Love, love love this book! Thanks for the great work.
Customer avatar
Marvin S April 23, 2020 12:52 am UTC
Thanks for a great product! In the desert location table, 71-75 is "Oasis (roll Oasis Table)" but there is no Oasis Table. Did you mean use the Jungle Table?
Customer avatar
Chuck D March 25, 2020 11:31 pm UTC
Another vote for POD
Customer avatar
Thomas C March 11, 2020 7:05 pm UTC
Would love a POD option… and page numbers, didn’t print for me.
Customer avatar
Frederic M February 23, 2020 5:44 pm UTC
A new vote for a POD version!! Great book for solo playing, the best so far!!
Customer avatar
Kai Z September 19, 2019 7:51 pm UTC
Is this product compatible with Call of Cthulhu version 7?
Customer avatar
5E Solo G September 19, 2019 11:01 pm UTC
Yep, that's what it was written for.
Customer avatar
Thomas C March 11, 2020 7:23 pm UTC
Yes. As far as I can tell in reviewing it yes it’s for 7th edition CoC.
Customer avatar
James G July 18, 2019 9:02 am UTC
Pod? Please. Pretty please!
Customer avatar
June 18, 2019 12:26 pm UTC
Recently purchased this, and just wanted to say I'm having a blast with it. So much fun. This is a great tool to keep the ol' brain cells going, thinking up situations etc on the fly.
Great work.
Customer avatar
Matthew B June 04, 2019 10:49 am UTC
Another vote here for PoD
Customer avatar
Paul L May 25, 2019 11:50 pm UTC
I have the same question - any chance for a POD?
Customer avatar
5E Solo G May 27, 2019 6:51 am UTC
Hey Paul
There are no plans for a POD at this stage. Perhaps if my schedule clears a bit towards the end of the year!
Thanks :)
Customer avatar
Kevin M May 07, 2019 1:36 am UTC
This looks awesome, any plans for a POD?
Customer avatar
UNAI G April 06, 2019 8:45 pm UTC
Just wanted to congratulate and thank the author. Just finished reading through the rules (I still see some misprints on the Story Direction tables though) and I can say this is exactly what I was looking for.

Typos on SD table:
1-20 Downtime
21-40 Discovery
41-60 Development

But after on pg 22 it says 21-40: DEVELOPMENT and pg 23, 41-60: DISCOVERY
Also on pg 23 we can read: Whenever you roll 45-66 Discovery... which probably is a typo too.
And being very picky... on pg 28 there's a wrong bracket on this sentence: If they are almost right )but not quite)

The system is simple but thorough, covering everything we need to solo CoC. Can't wait to try it this weekend. Thank you for helping us out on our solo questing!
Customer avatar
5E Solo G May 01, 2019 2:21 am UTC
Many thanks Unai, those typos have been fixed and the file updated.
Customer avatar
Alan H February 17, 2019 9:46 pm UTC
Any chance you can update the pdf with page numbers? I appreciate you have set up bookmarks but I would prefer a visual reference to show what page I'm on.

Thanks in advance.
Customer avatar
5E Solo G February 18, 2019 3:05 am UTC
Hey Alan.
I'll get onto that some time in the next few days. You can expect an update soon :)
Customer avatar
Alan H February 18, 2019 5:58 pm UTC
Thanks for that. I also noticed that the dice range in the Story Direction Table on page 24 doesn't match the ranges shown on the individual table headings e.g. Downtime is 1-20 in the table but 1-22 in the heading of the Downtime section. I'd appreciate clarification as to which is correct. Regards.
Customer avatar
5E Solo G February 18, 2019 7:06 pm UTC
I'll have to correct that too. Thanks Alan. Will get a new version either today or tomorrow.
Customer avatar
5E Solo G February 18, 2019 9:37 pm UTC
New version just uploaded Alan. Have corrected a few things. Page numbers are there, Story Direction Table altered, plus some other stuff.
Customer avatar
Alan H February 19, 2019 11:54 am UTC
Thanks again for a swift response.
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File Last Updated:
April 30, 2019
This title was added to our catalog on February 15, 2019.