"I poured everything I have into this book, sharing all the secrets, and I couldn't be more thrilled to share it with you," Pratt told PEOPLE.
Pratt, 41, is infamous for his villainous roles in reality television series such as The Hills and Got to Get Out, but the TV personality is stepping out from behind his bad boy reputation in his new book The Guy You Loved To Hate: Confessions From A Reality TV Villain, due out next year from Gallery Books.
"I've been misrepresented for most of my life -- and honestly? That worked for a while. But the real story is way more interesting than the fiction, which is why I'm finally telling it, no holds barred, in my own words," Pratt tells PEOPLE.
What many might not know of the reality star is that he wasn't born into Hollywood royalty, but worked his way up until he became the youngest executive producer in TV history at the age of 21.
That endeavor was 2005's Princes of Malibu starring Brody Jenner and Brandon Jenner. The series was short-lived, but Pratt bounced back quickly as "Y2K's most hated reality TV antagonist," on The Hills in 2006.
Pratt quickly became known for transforming toxicity into high ratings, but at the expense of his own mental health.
"As his mental health unraveled, calculated chaos gave way to full-blown instability -- hoarding weapons, blowing a fortune on crystals and pushing everyone away," the book's synopsis teases.
In 2008, Pratt married Heidi Montag, who quickly became one of his biggest supporters. The couple weathered their ups and downs, including a brief separation in 2010, and have since welcomed two sons: Gunner and Ryker. They set about "rebuilding their lives through hummingbird mysticism, family and lovable eccentricity across social media platforms."
However when the 2025 Palisades wildfire broke out, Pratt and Heidi lost their home. In his book, Pratt writes of finding community through TikTok and how members of the social media platform "rallied around them with breathtaking speed, transforming them from antiheroes into beloved survivors almost overnight."
Pratt shares that the experience was a reawakening for him, describing it as a time where he was "reborn not as a manufactured persona, but as exactly who he was: unedited, unfiltered and real."
"Now, for the first time, Spencer reveals the untold truth behind the spectacle -- a darkly comedic, unflinching and often surreal confessional from a TV villain who's finally broken character for good," the book's synopsis reads.
"I poured everything I have into this book, sharing all the secrets, and I couldn't be more thrilled to share it with you," Pratt says of the upcoming release.
The Guy You Loved To Hate: Confessions From A Reality TV Villain hits shelves Jan. 27, 2026 and is available now for preorder wherever books are sold.