This is one of the earlier books in the NW canon, and it is in some respects not everything the later ones would be.
Wolfe is already all of himself, but Archie is immature, he is not yet so tough and smart as he will become. And because talking to Archie is one of the best pleasures the NW books afford, you'll miss some good things.
But the mystery itself is remarkable, very well thought out and developed, and I just can't in conscience give this less than 4 stars.