Korean grammar for speaking book review

Korean grammar for speaking this book is part of my very small korean book collection that i have.
The book teach grammar points for speaking since a lot of korean learners have some difficulties in speaking.
Korean grammar for speaking is a good help, the book isn't heavy you can carry it with you everywhere, also the rules explanations are short and clear each unit provides new vocabulary.
The book contain lists of vocab, 59 unit,2 final exams, some papers to write your diary,pages for exercice's answers.
Each unit has 2 pages: 1 for a grammar explanation and the other for exercices.
The book is useful i learned a lot of new things new grammar rules and vocab. It is handy i carried with me all the time.
It is a good book for beginner to pre-intermediate learners, but the thing that i didn't like that the last unist aren't well explaned. Does units need more examples and explanation also since the book is designed for speaking i wish if it has a CD comes with it.