I think it is fine to write a book in both french and English, but do it elegantly. and not randomly (i've read some books like that), I suggest...
Here's a quote that might help: “If you get stuck, get away from your desk. Take a walk, take a bath, go to sleep, make a pie, draw, listen...
The hunger games series is being made into movies now. :) (can't wait!) That's the next big thing in my opinion.
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