Writing in English.

[liberty23]

Hello.
I need some help.
Thing is, I have written a book in English (fiction), but I want to make sure i got the idiom right, before I submit it to agents. I`m fairly certain the grammar is good, but I`m obsessed that "it doesn`t sound American".
Is there any way I can check the idiom and put my worries to rest?
thank you for your time.

[liberty23]

it`s roughly 70.000 words long

[Neil McCauley]

I think this is something you should have probably considered before you wrote the book. In other words, asking yourself if you were or are qualified to write a book in the style required would have been advisable. As things stand, however, the above poster has good advice. Seek advice from a proofreader, or at the very least find an American person to read some of the important parts for you.