This is the clue that was in the Civil War - North vs South book
What stands out so far:
- The capital letters Spell "LOOK DEEPER"
- The signature is an anagram that spells "LOOK DEEPER"
- The impression text at the very bottom looks like the name
There also seems to be an impression line drawn from the word "this" -
in the phrase "end of this trail of clues I laid" - possibly highlighting further significance for the name "Rusty Shackleford"
We have been unable to figure out what the impressions below and to the right of Rusty Shackleford are.
We know that our end game is to find a Email address and a password. The title "THE LOCK" might signify the email address. The password would be the key. This letter could be pointing us towards the email address.
215 North Laura Street The Civil War North vs South
SOLUTION OF PUZZLE: you have to count all the intersections on the line drawings and then find correspondong letter in LOCK message from Bookstore