I have just begun to read J. Andrew Kirk's What is Mission and have found it to be a fascinating presentation of an important subject. I have several sections marked for further study and am finding more to mark as I progress. Kirk covers a wide range of relevant issues for the mission practitioner and the beginning or advanced student of missions. I have found it to be a very rich resource for my study and will recommend it to others without reservation. I just wish I had found the book earlier in my study of missions.