ough makes seven different sounds in English. I don't remember all of them though. (that's one)
Though
Through
Cough
Tough
Bough
Dough
?????
And "Fish" can be spelled "GHOTI" --- the "gh" from "enough," the "o" from "women," and the "ti" from "caution."
Here's another fave of mine, coincidentally also involving fish ... If you write the word five times, it's a sentence:
Fish fish fish fish fish.
Shall I post the explanation or wait?
Incidentally, the author makes a mistake right in the beginning with "peruse at your leisure." To peruse actually means to study carefully, but everyone gets that one wrong!
EnouGH
LiGHt
GHost
there's three