In the 426-page book, Obama lays out her complicated relationship with the political world that made her famous. But her memoir is not a Washington read full of gossip and political score-settling — though she does lay bare her deep, quaking disdain for Trump, who she believes put her family’s safety at risk with his vehement promotion of the false birther conspiracy theory.

“The whole [birther] thing was crazy and mean-spirited, of course, its underlying bigotry and xenophobia hardly concealed. But it was also dangerous, deliberately meant to stir up the wingnuts and kooks,” she writes. “What if someone with an unstable mind loaded a gun and drove to Washington? What if that person went looking for our girls? Donald Trump, with his loud and reckless innuendos, was putting my family’s safety at risk. And for this I’d never forgive him.”

It is the most direct and personal language she’s used about him. Trump reacted angrily Friday, jabbing his finger as he told reporters that “she got paid a lot of money to write a book and they always insist that you come up with controversy. Well, I’ll give you a little controversy back. I’ll never forgive him for what he did to the United States military by not funding it properly. It was depleted. . . . She talked about safety. What he did to our military made this country very unsafe for you and you and you.”

The Washington Post obtained an early copy of Obama’s book, which will be released Tuesday. Even those who have followed Obama’s life closely in the decade and a half since her husband was a relatively unknown Illinois politician will come away with fresh understanding of how she sees the world and the people and experiences that shaped her.