How do I get my fishing past 225?

I have checked forums, asked other players and can not get an answer.
I have leveled out at fishing 225. I cna't go any higher. I have checked the AH
for books to go higher but the only one is the one I bought at 150 and there doesn't
seem to be any others on fishing other than the one for fishing above 300.
Is there a book?
Is there an NPC I need to speak to in order to move on from 225?
I am at a loss even though my character is in the outlands
I can't fish there because my level is too low. I can't get it any higher for some reason.
I have gone to the fishing trainer in every city I've been to that has one and none of them
trains any higher.
Please help I am trapped and want to do the fishing competitions and such..
Sincerely,
Susan K/MaraSinister