"Great Job You Got It"
This riddle is named after Julius Caesar, who is thought to be first to use this cipher.
Simply count the letters and arrange them in groups of the same number, here 4 will be easiest. It will be make 4 rows of 4. Then you put the rows one above the other and read up down, like so:
G T Y O
R J O T
E O U I
A B G T
Until you find the message.
I'm in the book, but not on any leaf; I'm in the mouth, but not in lip or teeth; I'm in the atmosphere, but never in the air; I wait on every one, but never on a pair; I am with you wherever you may go; And every thing you do I'm sure to know; Though when you did it I should not be there, Yet when 'twas done, you'd find me in the chair.What am I?
Pronounced as one letter, And written with three, Two letters there are, And two only in me. I'm double, I'm single, I'm black, blue, and gray, I'm read from both ends, And the same either way. What am I?