Breakthrough Comprehensive English is a visually easy-to-understand reference book that covers high school English grammar comprehensively, with in-depth explanations of subtle nuances and abundant illustrations, making it useful as a dictionary. It is particularly well-regarded for its detailed columns such as "Nigate-kun Ganbatte" (Hang in there, you struggling student), allowing learners to systematically master English grammar from the basics to exam level. Unparalleled Comprehensiveness and In-depth Explanations: Grammar points are explained exhaustively, allowing for a thorough understanding of even minor doubts and subtle nuances. Visually Easy-to-Understand Layout: Features color printing and abundant illustrations, making it less tiring even for long study sessions. Gradual Learning Structure: Structured by level into "Introduction," "Basics," and "Development," ensuring a solid foundation of knowledge from the ground up. Approachable Columns: Special feature pages like "Nigate-kun Ganbatte" and "Let's Understand the Differences" help resolve common English stumbling blocks. This book is recommended for those who want to use it as a supplementary dictionary for workbooks (like NextStage) or to solidify their foundation in English grammar. - Title: Breakthrough Upgraded - Authors: K. Yoshinami, H. Kitamura, I. Ueno, Y. Hongo, Edward M. Quackenbush, Ian C. Stirk - Publisher: Bunshunsha - Price: 1527 yen Thank you for looking.