It was fun to go back to this book after reading the second series so that I could fill in a few gaps. I would recommend that you read them in order, if you can! This book was really great. We see how Cass and Max Ernest's friendship developed and also what things both of them are afraid of. We also get a glimpse at their families and how they fit into them. Again, the author had a fabulous sense of humor in the book. I can see why this series is a hit!