Adoption of hard cover for this book indicates that it has been more widely used as a supplimentary text for organic courses. Indeed just as the title suggests, this serves as a guide to "push electrons", the main principle behind writing reasonable mechanisms for organic reactions. Many students, unfortunately, find writing mechanisms extremely difficult and have no clue of how to begin. This book does not present chemistry of major functional groups, rather focuses on discussing how electrons shall move properly. Students who consider taking organic chemistry should at least read through this book, as a prerequisite check for your knowledge of electron structures and feel comfortable about directions of which electrons move. Excellent tool for organic student except that now students have to pay a higher price for the hard-cover version.