Spotting the error - a problem-based workbook on English grammar and usage

Spotting the Error is a problem-based workbook on English grammar and usage for advanced learners of English. Each of the over 300 sentences included in the exercises contains at least one error, and the learner's task is to identify, correct, and explain the nature of the errors. The exercises are based on sentences in essays written by university students of English in Sweden. The key provides correct versions of all sentences, and explains the nature of most of the errors.