The Commanders - how accurate?

I’m currently reading The Commanders by Bob Woodward - an interesting book to be reading at this time (I didn’t realise Colin Powell is 65).

Before I get too far into the book and start drawing conclusions about any relationship between the attitudes of Bush Snr, Dick Cheney and Colin Powell towards Iraq in the late 1980s/early 1990s the the attitudes of Bush Jnr, Dick Cheney and Colin Powell towards Iraq now, I thought I’d seek some advice on the accuracy of Woodward’s book.

Can anyone help?