Adapted from Kate Bennett's "Free, Melania: The Unauthorized Biography" set for release Tuesday.

Washington (CNN) First lady Melania Trump, like those before her, has battled the vast juxtaposition between public perception and private citizen. And she remains, three years into her tenure, one of the most mysterious, quiet and press wary first ladies -- warm at times, stone-faced at others.

Despite being married to a reality star husband who can hardly bear to walk by a pack of reporters without saying something -- or let a morning go by without a tweet -- Melania Trump has fought against the stereotype that she is aloof, detached, even "trapped" in the White House, as the hashtag #FreeMelania, which spawned memes, suggested.

She has also proven she knows how to command the spotlight (remember that white hat?), use silence to her advantage and press forward as the spouse of one of the most controversial presidents in American history. Melania Trump's flares of independence, crossing from private to public, have also set her apart, and certainly suggest she doesn't need freeing of any kind.

Details of what really went on behind-the-scenes of all of these episodes and events are outlined in "Free, Melania: The Unauthorized Biography," in bookstores Tuesday. It reveals the fact that Melania Trump keeps her own separate bedroom in the White House residence, along with many other takeaways and anecdotes about Trump, who remains in many ways as mysterious and private three years in as she did on her first day on the job.

Her most telltale moments reveal hints of her notoriously private personal side. That hand swat on the tarmac in Tel Aviv, Israel, meant to express a quick flick of anger. Or the nudge with her elbow to Trump from the Truman balcony before the White House Easter Egg Roll, when the President was a tad slow to put his hand over his heart for the National Anthem.

Read More