Definitely not as classic as The House with the Clock in its Walls.
Most jarring was the change of illustrators. Mercer Mayer (!) .... doesn't really come from the same planet that Edward Gorey does. Now don't get me wrong, I love me some Little Monster, and he actually captures the new character Rose Rita pretty darn well. It's just hard for him to be creepy and have me take it seriously.
There were some definitely chilling parts to this book, but the general level of peril seemed lower. Also in this book (just like the first), everything could have been solved if Lewis ever actually talked to his Uncle Jonathan... He apparently didn't learn his lesson the first time.
Ah well, kid fiction. It was fun and quick, why am I complaining?