Apple CEO Tim Cook once offered his liver to Steve Jobs

According to a new book "Becoming Steve Jobs" due to be released this month, Apple chief executive Tim Cook was "yelled at" when he offered a part of his liver to a dying Steve Jobs.

According to BBC, an excerpt from the book says that Jobs only yelled at Cook three or four times in 13 years including the moment when Cook offered a part of his liver.

The book throws light on life inside Apple as it grew to become one of the world's most powerful companies.

The book also shows the relationship between Cook and Jobs.

In 2004, Jobs announced that he was suffering from pancreatic cancer and by 2009, the Apple chief executive was very ill, unable to come into the office and waiting for a liver transplant.