Probability and Statistics (4th Edition) by Morris H. DeGroot and Mark J. Schervish is a comprehensive textbook that provides an in-depth introduction to probability theory and statistical inference. It covers essential topics such as probability distributions, random variables, expectation, statistical estimation, hypothesis testing, and regression analysis. The book is known for its clear explanations, rigorous mathematical approach, and numerous practical examples that illustrate complex concepts. The fourth edition includes updates on modern statistical methods and computing techniques, making it suitable for advanced undergraduate and graduate students in mathematics, engineering, economics, and related fields. It's widely respected for its balance between theory and application, offering both detailed theoretical derivations and real-world problem-solving techniques, helping readers build a strong foundation in both probability and statistics.