The message was produced by using a KEYWORD-MIXED ALPHABET.
The Message Says:
Sometimes, a single puzzle may be made up of single parts. Each part must be solved in order to come to a complete solution. The first part of this puzzle is solving the cryptograms themselves. Next, you must determine the keyword used to mix the alphabet. Lastly, you must figure out the word used for the setting.
KEY WORD: CRYPTOGRAMS
SETTING WORD: SOLVE
PLAIN ALPHABET: CRYPTOGAMSBDEFHIJKLNQUVWXZ
C1: SBDEFHIJKLNQUVWXZCRYPTOGAM
C2: OGAMSBDEFHIJKLNQUVWXZCRYPT
C3: LNQUVWXZCRYPTOGAMSBDEFHIJZ
C4: VWXZCRYPTOGAMSBDEFHIJKLNQU
C5: EFHIJKLNQUVWXZCRYPTOGAMSBD