Mike, it doesn't matter if you "guessed wrong"....until Nanrich tells us, who's to know?
So glad you're having fun!
I still buy cryptogram books when I can find them. I really think they help me to solve the hardest ones.
I also agree with nanrich that the "easier" very long quotes are sometimes the hardest to solve. I have always had much better luck w/ the shorter ones....it's easier to see a "pattern" in them.