Just a few snippets from his wikipedia article:
He is a graduate of Stanford University, Yale Law School, and a Rhodes Scholar at Oxford University.
Booker has gained a reputation for his personal involvement in public service, including going on a 10-day hunger strike outdoors to draw attention to the dangers of open-air drug dealing, living on a "food stamp" budget to raise awareness of food insecurity, shoveling the driveway of a constituent upon request, allowing hurricane victims into his home, and saving a woman from a house fire at his own risk.
Booker exercises, has been a vegetarian (for health and environmental reasons) since his days at Oxford, does not drink alcohol, is uninterested in accumulating "stuff," and "has no known vices or addictions" other than books and coffee.
Booker generated controversy on May 12, 2012, when he appeared on Meet The Press as a surrogate for the re-election campaign of Barack Obama and made remarks which were critical of that campaign.[I] Booker stated that the attacks on Republican presidential candidate Mitt Romney's record at Bain Capital were "nauseating to me on both sides. It's nauseating to the American public. Enough is enough. Stop attacking private equity. Stop attacking Jeremiah Wright."