I first came across this book when I read the most cited research papers ever written. This is the one-page summary I wrote at the time. You can find others here.

Best line

Discovery commences with the awareness of anomaly, i.e., with the recognition that nature has somehow violated the paradigm-induced expectations that govern normal science. It then continues with a more or less extended exploration of the area of anomaly. And it closes only when the paradigm theory has been adjusted so that the anomalous has become the expected.