I am slowly working my way through the five books in the series. I am reading it from my Ultimate kindle edition (which I recommend, so much cheaper and I alway recommend kindle versions.)
The second book moves the story along fairly well. I didn’t really laugh out loud with this book either, but I liked the humor. It is a little subtler than the first book.
This books is focused on why the Earth exists. Doesn’t completely solve the issue. But takes a few very interesting turns.