"We built a prospectus to sell the club," he continued. "They were interested in other football clubs and we had to sell the idea that Manchester City was a good investment.
"They liked the vision and we started to meet the key stakeholders. We then realised that we'd got it right and we knew that we were going to make a big, bold statement in the world of sport, not just football.
"It was about getting someone who cared for the football club. They are passionate about it, they want to win and they're ambitious. They knew how passionate the fans were about the club - there was nothing plastic about this.
"I am proud of what I've done, but it's not me alone. What I feel I managed to do was build a team of people who believed and could see the vision.
"I'm not responsible for what happened at Manchester City. I only played my part and I was very fortunate to be given that opportunity."
But along with the success and City's progression on the field, there were also "a catalogue of four of five incidents" that Cook believes "will be his nemesis that he will carry forever".
"I was angry at AC Milan for the way they treated the football club with regards to Kaka," Cook added. "In retrospect, it was disrespectful to make public statements the way I did and I obviously regret that.
"Making a mistake with Uwe Rosler, my biggest concern was if I had dishonoured Uwe Rosler or the supporters' club.
"I deeply regret making a mistake. But I'm also a great believer that if you're not making mistakes, you're not trying hard enough."
Hear Ian Cheeseman's full interview with Garry Cook on BBC Radio Manchester's "In The Spotlight" from 18:00 BST on Thursday, 7 June
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