INTRODUCTION

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Hello! 

Welcome to this weekly-puzzle-turned-mystery! It will be updated every Friday. Your goal is to gather all the information and try to figure out what happened to Ms Valentine before the police execute Mr Don Johnsons for a crime he didn't commit! You will also be subject to an underlying love story, a manipulative detective, and the headache that is Algebra! But, let's make sure you have the basis of what I'm going on about. 

Chapter Outline

Keys: How do I use them?

What Types of Codes Should I Expect to See?

Why are you putting this book together?

Keys: How do I use them?

Keys, or hints to keys, will be found in the chapter's name. There will also be times when you will also get an add-on key in media. Take these as example: 

Chapter Name: Caesar Shift 

What you know: You can infer from this that I am using the monoalphabetic shift key known as 'Caesar Shift'. It is a code to which every letter is shifted by so many places. If I leave it just as 'Caesar Shift' you can assume that I have shifted everything by three places. If I add on -- for example: Caesar Shift; 6 left -- then you simply follow the extra directions. But for this chapter name you would have:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

D E F G H I J K L M N O P Q R S T U V W X Y Z A B C

and from there, you would use the replacements for words. So, if I were to write 'He likes pie,' it would become 'KH OLNHV SLH' 

Chapter Name: Use last code to decipher key

What you know: When you get a chapter name like this you do exactly what it says to do. This means that I will post two parts of the chapter: a key and the story itself. You might find an example like this: 

XVH DWYAVK

Using the last code (the last example), you can decode this and find the new key: Use ATBASH. ATBASH is a type of cipher that is super simple. Continue to What Types of Codes Should I Expect to See? to find out more. 

For when I use media pictures, you may see something like this: 

A=2, b=4, c=6, d=8, e=10, f=12, g=14, h=16, i=18

j=20, k=22, l=24, m=26, n=28, o=30, p=32, q=34

r=36. S=38, t=40, u=42, v=44, w=46, x=48, y=50, z=52

in a photo. Then, you would get something like this for the chapter name:

Chapter Name: F(x)=2x-2 

What you know: Alright, what you have to do now is find the INVERSE of the function I've given you. 

What does that mean? 

It means that I have given you the coding function -- the function I used to take the numbers in the photo to the number in the message -- and so it is your job to find the decoding function -- the coding function's inverse

How do you find the inverse of something? Here's a quick lesson, skip to: What Types of Codes Should I Expect to See? if you already know how. 

Alright, let's take the function I've already given: f(x)=2x-2

Your first replace 'f(x)' to 'y' so it will be: y=2x-2 

The second step is to switch your x and y (because an inverse is the opposite!): x=2y-2

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