Warning: This is not a normal textbook. This textbook introduces the first-semester student to computer science and what they need to know to solve problems and code solutions. Nothing extra. It demonstrates how to solve computational problems by focusing on organizing thoughts, performing structured thinking, following standard problem-solving techniques, and paying attention to the details. The student will learn to generalize patterns and algorithms in solving a variety of problems using computational thinking. In addition, the student will be encouraged to analyze and decompose the problem before writing one line of code. After learning what this textbook has to offer, the student will be able to solve a variety of problems and write decent code too.