Like the other books in the series, I thought it was good in that the book taught another great message: what you think comes out your mouth. If you can't say anything nice, you have to change how you are thinking. It's hard to say and think something nice about others when they are mean, rude and annoying. But seeing everyone as someone that God created, will help you to treat them differently.
This book, like book #2, also had more "bleeps" in it. When the Thought Broadcasting pen landed on the mean bully at school, his thoughts were "bleeps" and lots of them (pg. 101). I really don't think this is needed to make the story and it certainly doesn't add anything to it. Swearing shouldn't be seen as normal or expected of the bad kid at school. Wish this could of been left out.
Another thing about this book is that it is kind of becoming predictable. The books seem to follow the same pattern each time: Time stumblers create problems, TJ messes up and then problems somehow resolve at the end. Overall, there is a good moral to the story, but I wouldn't say it is my favorite series.
***I checked this book out from my local library to read for the Summer Reading Program by Tyndale House.