The new Ninth Edition of Halliday, Resnick and Walker's Fundamentals of Physics has been strategically revised to focus on engaging students, supporting critical thinking and moving students to the next level of physics understanding. Key to the Ninth Edition's support for critical thinking and development of understanding physics concepts is Jearl Walker's modern voice.  Jearl Walker is both an active teacher, who understands the challenges faced in today's classroom, and a world renowned communicator of science to the general public. His Flying Circus of Physics is a cult classic among physics students and instructors and material from this book is integrated throughout the Ninth Edition to catch students' attention, engage them, and encourage them to solve the underlying real world physics phenomenon and concepts, before they begin the more quantitative portion of the content or problem.