Rajan, who is the brother of former RBI governor Raghuram Rajan, worked with the Tata group for 23 years, as brand custodian and Ratan Tata's longest-serving executive assistant early on. In this podcast, he speaks with Pooja Sarkar about his book, 'The Brand Custodian: My Years with the Tatas', in which he offers a close view of the reticent Ratan Tata, along with the ups and downs that the group has been through