"The infrequent exchanges felt more like staged photo opportunities than real bonding. In fact, they were [staged] photo ops for ‘family’ Christmas cards," he explained.
When Bruce tied the knot with ex-wife Kris Jenner in 1991, things changed between him and his father, which cause them to eventually drift apart.
“After Dad met and married Kris, family became a business for him, and I stayed away for most of my teenage years. I didn’t want to be a part of their dynamic. I know now, though, that Dad was pretty unhappy in that house and felt like he wasn’t treated well,” Brandon wrote.
However, Caitlyn has touched on this topic before.
"The big formative years for them, I was really struggling with these issues," Caitlyn told Diane Sawyer in a 20/20 interview in 2015.
"I talked to all the boys about this after the fact, that, yeah, I didn’t do a good job. And I apologised to my kids for that."
In Brandon's book, he wrote something very similar.
"My father spent the first 65 years of her life trying to avoid answering the question, ‘How are you doing?' and because of that, she didn't ask it often, either. And though I understand that she avoided the question because the answer would have laid bare too many struggles, it made my relationship with her challenging."
He continued: "People connect with each other through vulnerability, and you can only get someone to open up to you if you are willing to be vulnerable yourself. Because she was shielding something so important from herself, Dad remained distant for much of my life."
However, it took Caitlyn transitioning in 2015 for the pair to work on their relationship. He said: "my dad and I began to reestablish a relationship".
"Once Dad decided to go through with the transition, I was the first of her children she confided in…As soon as Dad said it herself, I was so happy for her. It was as if she were truly stepping into who she was," Brandon wrote.
"As her son, I wish my dad had been able to transition sooner, not only because I think she would have been much happier, but because I think we could have built a stronger relationship earlier. Now I'm making up for lost time. I speak to my dad almost every day, and every time, she asks me, ‘How are you doing?'"