Holly Madison's book is allegedly full of lies, as an ex-housemate slammed the tell-all book. According to a report from Daily Mail, former Playboy playmate Izabella St James said the "Down the Rabbit Hole" author had a sinister obsession with magazine founder Hugh Hefner.

The 39-year-old Polish beauty said that Holly Madison is using her book to avenge on the 89-year-old pornography mogul. The 35-year-old detailed in "Down the Rabbit Hole" how Hugh Hefner manipulated her throughout her seven-year stay inside the Playboy mansion. She also revealed the perverted sexual acts, rampant drug use and bullying that took place at the infamous house.

Izabella St James slammed the "delusional" claims made by Holly Madison in her book.

"Holly chose to just completely lie and omit that she was absolutely, completely obsessed with Hugh," Izabella St James said.

"The reality is, Holly had a calculated plan to get in there and be Hef's girlfriend. She was completely obsessed with him, to the point where she tried to make herself look like him."

Contrary to claims made by Holly Madison in her book about how Hugh Hefner was obsessed with her, Izabella St James detailed how it is actually the other way around.

"That maroon robe that [Hugh Hefner] wears, she had one made so she could match him," she said. "She knew that he was enamored with Marilyn Monroe, so she went and got her haircut and makeup done like Marilyn, which totally backfired."

The former housemate went on to say that Holly Madison's obsession with Hugh Hefner is "sinister."

"She is just like ''Single White Female,'" the sexy model explained. "She stalked him. She would go through his stuff. She tried to look like the ex-girlfriends he liked the most. She kept emulating their looks, his favorite girlfriends from the past."

Holly Madison's alleged obsession with Hugh Hefner even affected the troubled reality star's choice of food.

"She had a dark obsession with Hef, with becoming everything Hef, even to the point where she started eating exactly the same meals as him," Izabella St. James said.

"He ate Campbell's Chicken Soup from the can everyday for lunch with crackers. All of a sudden, that was her favorite lunch. If he had a muffin with strawberry jam, she wanted a muffin with strawberry jam."

"It was so bizarre and really weird. She was so obsessed with Hef," she said.

Izabella St James said that Holly Madison's tell-all book is her way of getting back at Hugh Hefner for not marrying her in spite of her obsession.

"Everyday was going through scrapbooks, reading old interviews Hef did, and studying everything about Playboy. She wanted to be Playboy personified," she said.

 "Hef was never that into her. He was never that into Holly."

"[And now] it seems like she took the rejection and is nasty and vengeful about it," Izabella St. James concluded.