In his no holds barred autobiography, which is due to be out on Thursday, Pietersen recalled his sacking from the team but also hoped for a comeback.
"I didn't always tread wisely. I was often naive and sometimes stupid. I was no villain, though," he writes.
"Cricket is politics. Bad politics. Things change overnight. I believe that the governing body of English cricket could change; I believe it should change. I am happy for now, but I would be happy to come back. Anything can happen in cricket."
"Contagiously sour. Infectiously dour. He could walk into a room and suck all the joy out of it in five seconds. Just a Mood Hoover. That's how I came to think of him," he said referring to the former coach.
"A clique choked our team... And Andy Flower let that clique grow like a bad weed. The dressing room slowly became the territory of the biggest mouths among the bowlers - and a wicketkeeper. They ran an exclusive club. If you're outside that clique, you were fair game for mocking, ridicule, bullying," he added.
"I know, though, that while Cooky is a nice man, he is also a company man. A safe pair of hands; he won't rock the boat," he said.
Pietersen said the ECB needed a scapegoat who was, "big, boisterous and annoying...Somebody who left colourful footprints on the pristine white carpets.
