In this updated second edition, I've made significant improvements by correcting ambiguous instruction explanations. This ensures that all guidance is clear and precise, allowing you to study more effectively and confidently. I believe in being thoroughly prepared rather than underinformed. That's why I've analyzed not only the Digital SAT but also its predecessor, the redesigned SAT. When the College Board introduced the redesigned SAT in 2016, I examined the practice tests and continued analyzing subsequent exams. Through this ongoing effort, I compiled key grammatical concepts that I knew would be essential for my students to master. Beyond the commonly tested topics, I've included some challenging grammatical concepts that appeared only occasionally on the redesigned SAT yet often prove difficult for students to grasp or find clear explanations for. For instance, "ellipsis" was tested in May 2017, "semicolons" for lists in December 2017, and "asyndeton" in March 2021. While "semicolons" for lists appeared only once on the redesigned SAT, it has become more common on the Digital SAT. In short, every example question and sentence in this book is modeled on actual SAT questions from 2016 to the present, ensuring that you are well-prepared for the exam.