Lady Gaga's former assistant is reportedly writing a tell-all book about her one-time boss. Fame Monster is said to revisit Jennifer O'Neill's two years travelling the world with Gaga, which she claims included running her errands, and sometimes even sleeping in the same bed.

Atria Books, an imprint of Simon & Schuster, have told the Hollywood Reporter and New York Post that O'Neill has inked a contract with them. It's a deal worth "up to $1 million", according to the Post, though they have yet to announce a publication date.

O'Neill's history with Gaga first came to light in 2011, when she sued the singer for hundreds of thousands of dollars in overtime pay. Between 2009 and 2011, O'Neill claimed, she was expected "to be working and available 24/7" – handling Gaga's luggage, administering her "medicine", waking her up, and even "ensuring the promptness of a towel following a shower". As part of her testimony, O'Neill alleged that she was "required" to sleep in Gaga's bed, "because [the star] didn’t sleep alone".

Gaga was not pleased with O'Neill's allegations. "This whole case is bullshit and you know it," she said during a recorded deposition. "[Jennifer] thinks she's just like the queen of the universe ... [but] in my work and what I do, I'm the queen of the universe every day ... She knew there was no overtime ... [She's a] fucking hood-rat who is suing me for money that she didn't earn."

In October 2013, Gaga and O'Neill settled the lawsuit out of court. Terms were never revealed, although O'Neill's tell-all deal suggests that they did not include a non-disclosure agreement. Gaga and her representatives have yet to respond to the book announcement.