Puzzle Baron Cryptograms

Can you solve these encrypted messages?
 
Cryptogram puzzles use a substitution code to scramble messages. To decipher them, you’ll need to figure out the encryption key—but remember, this changes for every puzzle. You’ll also probably need to use your pencil eraser a lot. (You are using a pencil, right?)
 
Puzzle Baron’s Cryptograms includes these features:
• More than 600 puzzles with blanks for writing the letters
• Three hints (a.k.a. cheats) for every puzzle
• An answer section to check your work
 
The Puzzle Baron has scoured the world for quotations from antiquity to modern times and from people as diverse as Yogi Berra and Mark Twain to Winston Churchill and Abraham Lincoln. Even Anonymous makes a couple appearances. You’ll enjoy hours of trying to solve these profound, funny, and sometimes bizarre cryptograms.