Clue 1


Solving this is a matter of frequency...




Clue 2


After careful analysis, you'll see that you have everything you need.




Solution


This message is a substitution cipher, meant to be solved via frequency analysis. This can be done from the ground up, or can be done using the letters and numbers on the front of the card. These letters and numbers correspond to the letter frequency of the plaintext message. The message is signed 'Anna Eve Massam'




Clue 3


How many times do you count Q? Does that number appear elsewhere?




Clue 4


Once you've correlated your key, it's a simple matter of translation.





Clue 1


Interesting Start, But Next?




Clue 2


International Standard....Books, Numbers...




Solution


The ISBNs give you five book titles that include a location, along with other words.
The covers on the front of the card show five partial book titles. Cross referencing the ISBNs to the titles on the front shows that the second book shown, and the second ISBN listed don't match up.

This gives two important pieces of information - the location from the ISBN, 'Minneapolis', as well as the department from the spine, 'Linguistic Studies'




Clue 3


Compare and contrast, how do your titles match up?




Clue 4


Five ISBNs, and five titles on the spines...




Clue 5


In each set of books you have, one should stand out.





Clue 1


Mirror images...




Clue 2


With careful reflection you can progress...




Solution


Each stamp has two digits, and depicts a mirror. To find the date you need, invert each pair of digits. So, 41 becomes 14 and 14 becomes 41, to yield the full date of '1441'




Clue 3


The signature on the message follows this same pattern...




Clue 4


Forwards, backwards, makes no difference...




Clue 5


dnuora ti nrut.





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