Re: IS the okuda timeline canon?
Short answer: no.
First and foremost, these books are based on materials created to aid the production team in maintaining continuity and consistency. They are secondly meant to make a buck and provide fan enjoyment which IMHO they do.
But they are most certainly not canon. I'd give them more credence than some books, simply because they were indeed members of the production team, but they're still not canon. If the screen conflicts with them, the screen wins.
"If you can't take a little bloody nose, maybe you ought to go back home and crawl under your bed. It's not safe out here. It's wondrous, with treasures to satiate desires both subtle and gross; but it's not for the timid." - Q