This book investigates common grammatical errors made by upper-intermediate English learners and provides a systematic framework for identifying and correcting these mistakes. Authors Amanda Maris and Kenna Bourke utilize their expertise in English language pedagogy to construct a diagnostic approach that targets specific linguistic weaknesses. The text functions as a self-study tool, guiding students through error analysis to improve their performance on the First Certificate in English (FCE) examination.

Educators and students frequently highlight this text as a practical resource for focused exam preparation. Experts note that the diagnostic format is particularly effective for learners who require a structured method to track their progress and refine their grammatical accuracy.