It's an autobiography by politician Elizabeth Warren. Before she w19as a politician, she was an academic. She studied bankruptcy. When she started, there was received wisdom around bankruptcy: people who went bankrupt did so because they were unreliable. But she got got together with some academics and started counting up folks who went bankrupt (and why). And thus figured out that the newly-unregulated banks were making loans to folks who'd have trouble paying those loans off. There's more profit for banks if debtors can't pay off their debts so early, have to make more interest payments.
The rest of the book is about politics, the road to getting elected. I'm not especially into that, and didn't find it interesting. Unfortunately, that's a large fraction of the book.