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Kevin Federline is sounding the alarm about his ex-wife’s mental health.

And he’s gone so far as to claim that Britney Spears’ behavior has led him to fear for the safety of their two sons.

Federline, who was married to Spears from 2004 to 2007, has a new memoir on the way, and the excerpts we’re seeing so far do not portray Britney in a very flattering light.

Kevin accuses Britney of brandishing weapons near their sons

The book, titled You Thought You Knew , won’t hit stores until next week.

But an excerpt published today by the New York Times is already generating controversy on social media.

The most shocking passages have to do with Britney’s mental health issues and her alleged behavior toward her sons, Sean Preston, 20, and Jayden James, 19.

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