I first read The Gospel According To The Apostles (formerly, Faith Works) back in 1994, and I read it once per year for the next six years. This book became a turning point in my life and my theology. MacArthur unfolded for me the difference between what most American Christians have come to believe is the Gospel and what the Apostles of Jesus Christ say the Gospel is, and I'm eternally better off for it.
Many critics (especially among the popular Dispensationalist camp) have accused MacArthur of teaching a works-based righteousness (as opposed to a grace-based righteousness), but for someone who has actually read the book both thoughtfully and repeatedly, I can say with a certain amount of confidence that MacArthur's critics are simply wrong.
If you've been persuaded by the rhetoric of MacArthur's critics but have not read The Gospel According To The Apostles, let me encourage you to purchase it, find a quiet place to sit and read it, and let MacArthur's clear logic and accurate Bible-centered teaching speak for itself. And once you've read The Gospel According To The Apostles, then give a close read to MacArthur's Gospel According to Jesus. I think you'll be glad you did.
If you are looking for a book that will blow your hair back, this is it. I've read The Gospel According to the Apostles once a year since it was published (originally titled, Faith Works). The Lord used this book to convert me from Arminianism to Calvinism, and I thank God for it. Absolutely outstanding book.