'Strong Looks Better Naked,' published by Simon & Schuster, is filled with practical advice, recipes, and personal anecdotes.
She says her body transformation wasn't about her body at all; it began as an escape act from the media and therapy for her mind.
"The gym was a genuine oasis - a refuge and a sanctuary... My workouts were not about vanity; they were about relieving stress. I had so much going on emotionally, and I was disinclined to talk about it, even with my own family, so the workouts became a form of therapy," the sister of celebrated reality TV star Kim Kardashian says.
In a culture that worships skinny, Khloe writes about the power of strength: a strong body lays the foundation for a strong mind, which leads to strength of heart, character, and ultimately spirit.
"Body, mind, soul. That phrase is everywhere; I hear it all time, but until recently I had never given it much thought," she says.