Codes for people who want to learn them

A guide to deduction, by Sherlock Holmes. If you would like to learn how to deduct people the way I do, to impress them, or for a good reason, or just to know you can, the secrets are inside my book.

Want to write a killer thriller? This guide contains tricks and tips that will navigate you through the various aspects of a thriller novel. Find answers to the questions that have been burning on your mind.