Mike Isaac’s Super Pumped (p. 158) describes Uber’s legal department as not “particularly strong” which was “partially design” to increase Kalanick’s control. Isaac remarks that Yoo “would push back on Kalanick occasionally, but her fear of being ‘iced out’ kept her from getting in Kalanick’s face about every legal concern she had.” Isaac continues: “Yoo was often unable–and at times reluctant–to influence her boss. When she did decide to raise an issue with Kalanick, Travis regularly treated her concerns as just another annoyance, especially when they had to do with legal compliance.”