Despite the fact that this book was coauthored, it maintains the same feel of the other Archives of Anthropos books, although there is less of the originality and creativity of the previous five. Lisa, Wesley, and Kurt basically follow the pattern of the other books - being sent to Anthropos by Gaal, struggling to make good decisions, meetings foes and friends. This book also adds a new girl, Betty, who goes through her own Mary-ish struggles as a newbie to the whole Anthropos/Gaal thing. Although the characters do rehash their past adventures a bit awkardly, they only do so at the very beginning. So, I noticed that, but it didn't really bother me. Plotwise, I thought the main weakness was the denouement. As far as climactic last battles and glorious beginning-endings go, this book doesn't come close to C.S. Lewis's last Chronicles of Narnia book. Also, the spiritual lessons aren't woven in with the craftfulness and subtlety I've come to expect from these books. However, all in all this is a good book. If you enjoyed the other five books in this series, you'll probably like this one too.