I suspect the book of Joshua is a difficult one to get right for the editor of an introductory level commentary series. Much of the first half has interesting events and Bible stories even a child can understand. The second half is often a jumble of completely unfamiliar and uninteresting names of cities, boundaries and deceased kings. It would require a writer with a high degree of technical expertise to make sense of this second half, but this might put the commentary beyond the reach of the layman. This commentary went the second route and while it tries to cater to the lesser student, it is ultimately more of a well executed mid level treatise on archeology and the Hebrew text than a spiritual work. If this were a commentary on the Doomsday book it would have a similar feel. There are extensive notes and many charts that show both the immense level of work that went into the volume and the level of understanding and interest in Jewish geography, both present and 3,300 years past, that is required to understand it. For the pastor and seminarian, this should be a great commentary and is in fact graded very highly on the commentary review sites for this reason. Even for the layman, this is worth working your way through especially if you already own the whole commentary series. The book isn't afraid to address questions of dating and the like though it does shy away from questions of morality that can trouble us in the wholesale slaughter of men, women and children in many cities. As you would expect the first half of the verse by verse commentary on events like the Jericho and Rahab or the sin at Ai is the best part of the book. Since this is likely to be what you are teaching a Sunday School class on, this commentary has value for the teacher.