"The English Grammar Workbook For Adults: A Self-Study Guide To Improve Functional Writing" by Michael Digiacomo is a comprehensive textbook designed for adult learners looking to improve their grammar and writing skills. Published by Callisto Publishing LLC in 2020, this trade paperback book covers subjects such as grammar, punctuation, and business writing. With a focus on intermediate and business levels, the book provides 208 pages of exercises and explanations to help readers enhance their language arts skills. Whether for high school, middle school, adult education, or vocational training, this workbook offers a practical approach to improving functional writing in English."