The Truth about Grace is a short volume by John MacArthur, but is is rather meaty! And it needs to be; grace is not easy to define nor understand. MacArthur does a wonderful job explaining what Grace is and the theology of grace. You might not agree with all his views but it is a very solid book and well-written as well.
While I personally can tell a person what grace is and define it somewhat well, the practical applications and reality is much more difficult for me, so I found this book both helpful and challenging.
I was provided a copy of the book by Booksneeze, a program of Thomas Nelson Publishers. I was not required to write a favorable review.